<p>Provides any useful information about the protein, mostly biological knowledge.</p><p><a href='../manual/function_section' target='_top'>More...</a></p>Functionⁱ

<p>The <a href="http://www.geneontology.org/">Gene Ontology (GO)</a> project provides a set of hierarchical controlled vocabulary split into 3 categories:</p><p><a href='../manual/gene_ontology' target='_top'>More...</a></p>GO - Molecular functionⁱ

1. cholesterol binding Source: BHF-UCL

   <p>Inferred by Curator</p> <p>Used for cases where an annotation is not supported by any evidence but can be reasonably inferred by a curator from other GO annotations for which evidence <br />is available.</p> <p>More information in the <a href="http://geneontology.org/page/guide-go-evidence-codes#ic">GO evidence code guide</a></p> Inferred by curatorⁱ

   • 11162594

2. enzyme regulator activity Source: BHF-UCL

   <p>Inferred from Direct Assay</p> <p>Used to indicate a direct assay for the function, process or component indicated by the GO term.</p> <p>More information in the <a href="http://geneontology.org/page/guide-go-evidence-codes#ida">GO evidence code guide</a></p> Inferred from direct assayⁱ

   • 11060345

3. high-density lipoprotein particle receptor binding Source: BHF-UCL

   <p>Inferred from Physical Interaction</p> <p>Covers physical interactions between the gene product of interest and another molecule (or ion, or complex).</p> <p>More information in the <a href="http://geneontology.org/page/guide-go-evidence-codes#ipi">GO evidence code guide</a></p> Inferred from physical interactionⁱ

   • 9254056

4. lipase inhibitor activity Source: BHF-UCL

   <p>Inferred from Direct Assay</p> <p>Used to indicate a direct assay for the function, process or component indicated by the GO term.</p> <p>More information in the <a href="http://geneontology.org/page/guide-go-evidence-codes#ida">GO evidence code guide</a></p> Inferred from direct assayⁱ

   • 15576844
   • 182536
   • 18635818
   • 3973011

5. phospholipid binding Source: BHF-UCL

   <p>Inferred from Direct Assay</p> <p>Used to indicate a direct assay for the function, process or component indicated by the GO term.</p> <p>More information in the <a href="http://geneontology.org/page/guide-go-evidence-codes#ida">GO evidence code guide</a></p> Inferred from direct assayⁱ

   • 11060345
   • 4066713

<p>The <a href="http://www.geneontology.org/">Gene Ontology (GO)</a> project provides a set of hierarchical controlled vocabulary split into 3 categories:</p><p><a href='../manual/gene_ontology' target='_top'>More...</a></p>GO - Biological processⁱ

1. cellular response to glucose stimulus Source: Ensembl
2. cholesterol efflux Source: BHF-UCL

   <p>Inferred from Direct Assay</p> <p>Used to indicate a direct assay for the function, process or component indicated by the GO term.</p> <p>More information in the <a href="http://geneontology.org/page/guide-go-evidence-codes#ida">GO evidence code guide</a></p> Inferred from direct assayⁱ

   • 11162594
   • 16443932

3. cholesterol homeostasis Source: BHF-UCL

   <p>Inferred from Mutant Phenotype</p> <p>Describes annotations that are concluded from looking at variations or changes in a gene product such as mutations or abnormal levels and includes techniques such as knockouts, overexpression, anti-sense experiments and use of specific protein inhibitors.</p> <p>More information in the <a href="http://geneontology.org/page/guide-go-evidence-codes#imp">GO evidence code guide</a></p> Inferred from mutant phenotypeⁱ

   • 18767813

4. cholesterol metabolic process Source: Ensembl
5. chylomicron remnant clearance Source: BHF-UCL

   <p>Inferred from Direct Assay</p> <p>Used to indicate a direct assay for the function, process or component indicated by the GO term.</p> <p>More information in the <a href="http://geneontology.org/page/guide-go-evidence-codes#ida">GO evidence code guide</a></p> Inferred from direct assayⁱ

   • 4020294

6. G-protein coupled receptor signaling pathway Source: BHF-UCL

   <p>Inferred from Direct Assay</p> <p>Used to indicate a direct assay for the function, process or component indicated by the GO term.</p> <p>More information in the <a href="http://geneontology.org/page/guide-go-evidence-codes#ida">GO evidence code guide</a></p> Inferred from direct assayⁱ

   • 16443932

7. high-density lipoprotein particle remodeling Source: BHF-UCL

   <p>Inferred from Mutant Phenotype</p> <p>Describes annotations that are concluded from looking at variations or changes in a gene product such as mutations or abnormal levels and includes techniques such as knockouts, overexpression, anti-sense experiments and use of specific protein inhibitors.</p> <p>More information in the <a href="http://geneontology.org/page/guide-go-evidence-codes#imp">GO evidence code guide</a></p> Inferred from mutant phenotypeⁱ

   • 17438339

8. inflammatory response Source: Ensembl
9. lipoprotein metabolic process Source: Reactome
10. lipoprotein transport Source: Ensembl
11. negative regulation of cholesterol import Source: BHF-UCL

    <p>Inferred from Mutant Phenotype</p> <p>Describes annotations that are concluded from looking at variations or changes in a gene product such as mutations or abnormal levels and includes techniques such as knockouts, overexpression, anti-sense experiments and use of specific protein inhibitors.</p> <p>More information in the <a href="http://geneontology.org/page/guide-go-evidence-codes#imp">GO evidence code guide</a></p> Inferred from mutant phenotypeⁱ

    • 15778093

12. negative regulation of fatty acid biosynthetic process Source: BHF-UCL

    <p>Inferred from Direct Assay</p> <p>Used to indicate a direct assay for the function, process or component indicated by the GO term.</p> <p>More information in the <a href="http://geneontology.org/page/guide-go-evidence-codes#ida">GO evidence code guide</a></p> Inferred from direct assayⁱ

    • 11060345
    • 18635818

13. negative regulation of high-density lipoprotein particle clearance Source: BHF-UCL

    <p>Inferred from Mutant Phenotype</p> <p>Describes annotations that are concluded from looking at variations or changes in a gene product such as mutations or abnormal levels and includes techniques such as knockouts, overexpression, anti-sense experiments and use of specific protein inhibitors.</p> <p>More information in the <a href="http://geneontology.org/page/guide-go-evidence-codes#imp">GO evidence code guide</a></p> Inferred from mutant phenotypeⁱ

    • 15778093

14. negative regulation of lipid catabolic process Source: BHF-UCL

    <p>Inferred from Direct Assay</p> <p>Used to indicate a direct assay for the function, process or component indicated by the GO term.</p> <p>More information in the <a href="http://geneontology.org/page/guide-go-evidence-codes#ida">GO evidence code guide</a></p> Inferred from direct assayⁱ

    • 15576844

15. negative regulation of lipid metabolic process Source: BHF-UCL

    <p>Inferred from Direct Assay</p> <p>Used to indicate a direct assay for the function, process or component indicated by the GO term.</p> <p>More information in the <a href="http://geneontology.org/page/guide-go-evidence-codes#ida">GO evidence code guide</a></p> Inferred from direct assayⁱ

    • 182536

16. negative regulation of lipoprotein lipase activity Source: BHF-UCL

    <p>Inferred from Direct Assay</p> <p>Used to indicate a direct assay for the function, process or component indicated by the GO term.</p> <p>More information in the <a href="http://geneontology.org/page/guide-go-evidence-codes#ida">GO evidence code guide</a></p> Inferred from direct assayⁱ

    • 11060345
    • 18635818
    • 3973011

17. negative regulation of low-density lipoprotein particle clearance Source: BHF-UCL

    <p>Inferred from Mutant Phenotype</p> <p>Describes annotations that are concluded from looking at variations or changes in a gene product such as mutations or abnormal levels and includes techniques such as knockouts, overexpression, anti-sense experiments and use of specific protein inhibitors.</p> <p>More information in the <a href="http://geneontology.org/page/guide-go-evidence-codes#imp">GO evidence code guide</a></p> Inferred from mutant phenotypeⁱ

    • 15778093

18. negative regulation of receptor-mediated endocytosis Source: BHF-UCL

    <p>Inferred from Direct Assay</p> <p>Used to indicate a direct assay for the function, process or component indicated by the GO term.</p> <p>More information in the <a href="http://geneontology.org/page/guide-go-evidence-codes#ida">GO evidence code guide</a></p> Inferred from direct assayⁱ

    • 1917954

19. negative regulation of triglyceride catabolic process Source: BHF-UCL

    <p>Inferred from Direct Assay</p> <p>Used to indicate a direct assay for the function, process or component indicated by the GO term.</p> <p>More information in the <a href="http://geneontology.org/page/guide-go-evidence-codes#ida">GO evidence code guide</a></p> Inferred from direct assayⁱ

    • 18635818
    • 3973011

20. negative regulation of very-low-density lipoprotein particle clearance Source: BHF-UCL

    <p>Inferred from Direct Assay</p> <p>Used to indicate a direct assay for the function, process or component indicated by the GO term.</p> <p>More information in the <a href="http://geneontology.org/page/guide-go-evidence-codes#ida">GO evidence code guide</a></p> Inferred from direct assayⁱ

    • 1917954

21. negative regulation of very-low-density lipoprotein particle remodeling Source: BHF-UCL

    <p>Inferred from Direct Assay</p> <p>Used to indicate a direct assay for the function, process or component indicated by the GO term.</p> <p>More information in the <a href="http://geneontology.org/page/guide-go-evidence-codes#ida">GO evidence code guide</a></p> Inferred from direct assayⁱ

    • 3973011

22. phospholipid efflux Source: BHF-UCL

    <p>Inferred from Direct Assay</p> <p>Used to indicate a direct assay for the function, process or component indicated by the GO term.</p> <p>More information in the <a href="http://geneontology.org/page/guide-go-evidence-codes#ida">GO evidence code guide</a></p> Inferred from direct assayⁱ

    • 11162594

23. phototransduction, visible light Source: Reactome
24. regulation of Cdc42 protein signal transduction Source: BHF-UCL

    <p>Inferred from Direct Assay</p> <p>Used to indicate a direct assay for the function, process or component indicated by the GO term.</p> <p>More information in the <a href="http://geneontology.org/page/guide-go-evidence-codes#ida">GO evidence code guide</a></p> Inferred from direct assayⁱ

    • 16443932

25. response to drug Source: Ensembl
26. response to nutrient Source: Ensembl
27. response to peptide hormone Source: Ensembl
28. retinoid metabolic process Source: Reactome
29. reverse cholesterol transport Source: BHF-UCL

    <p>Inferred by Curator</p> <p>Used for cases where an annotation is not supported by any evidence but can be reasonably inferred by a curator from other GO annotations for which evidence <br />is available.</p> <p>More information in the <a href="http://geneontology.org/page/guide-go-evidence-codes#ic">GO evidence code guide</a></p> Inferred by curatorⁱ

    • 15778093

30. small molecule metabolic process Source: Reactome
31. triglyceride catabolic process Source: BHF-UCL

    <p>Inferred from Direct Assay</p> <p>Used to indicate a direct assay for the function, process or component indicated by the GO term.</p> <p>More information in the <a href="http://geneontology.org/page/guide-go-evidence-codes#ida">GO evidence code guide</a></p> Inferred from direct assayⁱ

    • 11060345

32. triglyceride homeostasis Source: BHF-UCL

    <p>Inferred from Mutant Phenotype</p> <p>Describes annotations that are concluded from looking at variations or changes in a gene product such as mutations or abnormal levels and includes techniques such as knockouts, overexpression, anti-sense experiments and use of specific protein inhibitors.</p> <p>More information in the <a href="http://geneontology.org/page/guide-go-evidence-codes#imp">GO evidence code guide</a></p> Inferred from mutant phenotypeⁱ

    • 18767813

33. triglyceride metabolic process Source: HGNC

    <p>Inferred from Mutant Phenotype</p> <p>Describes annotations that are concluded from looking at variations or changes in a gene product such as mutations or abnormal levels and includes techniques such as knockouts, overexpression, anti-sense experiments and use of specific protein inhibitors.</p> <p>More information in the <a href="http://geneontology.org/page/guide-go-evidence-codes#imp">GO evidence code guide</a></p> Inferred from mutant phenotypeⁱ

    • 17142127

34. triglyceride mobilization Source: Ensembl
35. very-low-density lipoprotein particle assembly Source: BHF-UCL

    <p>Traceable Author Statement</p> <p>Used for information from review articles where the original experiments are traceable through that article and also for information from text books or dictionaries.</p> <p>More information in the <a href="http://geneontology.org/page/guide-go-evidence-codes#tas">GO evidence code guide</a></p> Traceable author statementⁱ

    • 18399797

<p>UniProtKB Keywords constitute a <a target="_top" href="/keywords">controlled vocabulary</a> with a hierarchical structure. Keywords summarise the content of a UniProtKB entry and facilitate the search for proteins of interest.<p><a href='../help/keywords' target='_top'>More...</a></p>Keywords - Biological processⁱ

<p>UniProtKB Keywords constitute a <a target="_top" href="/keywords">controlled vocabulary</a> with a hierarchical structure. Keywords summarise the content of a UniProtKB entry and facilitate the search for proteins of interest.<p><a href='../help/keywords' target='_top'>More...</a></p>Keywords - Ligandⁱ

Enzyme and pathway databases

<p>Provides information about the protein and gene name(s) and synonym(s) and about the organism that is the source of the protein sequence.</p><p><a href='../manual/names_and_taxonomy_section' target='_top'>More...</a></p>Names & Taxonomyⁱ

Organism-specific databases

<p>Provides information on the location and the topology of the mature protein in the cell.</p><p><a href='../manual/subcellular_location_section' target='_top'>More...</a></p>Subcellular locationⁱ

<p>The <a href="http://www.geneontology.org/">Gene Ontology (GO)</a> project provides a set of hierarchical controlled vocabulary split into 3 categories:</p><p><a href='../manual/gene_ontology' target='_top'>More...</a></p>GO - Cellular componentⁱ

1. chylomicron Source: BHF-UCL

   <p>Inferred from Direct Assay</p> <p>Used to indicate a direct assay for the function, process or component indicated by the GO term.</p> <p>More information in the <a href="http://geneontology.org/page/guide-go-evidence-codes#ida">GO evidence code guide</a></p> Inferred from direct assayⁱ

   • 8245722

2. early endosome Source: Reactome
3. extracellular region Source: Reactome
4. extracellular space Source: BHF-UCL

   <p>Inferred from Direct Assay</p> <p>Used to indicate a direct assay for the function, process or component indicated by the GO term.</p> <p>More information in the <a href="http://geneontology.org/page/guide-go-evidence-codes#ida">GO evidence code guide</a></p> Inferred from direct assayⁱ

   • 11060345

5. extracellular vesicular exosome Source: UniProtKB

   <p>Inferred from Direct Assay</p> <p>Used to indicate a direct assay for the function, process or component indicated by the GO term.</p> <p>More information in the <a href="http://geneontology.org/page/guide-go-evidence-codes#ida">GO evidence code guide</a></p> Inferred from direct assayⁱ

   • 23376485
   • 23533145

6. intermediate-density lipoprotein particle Source: BHF-UCL

   <p>Inferred from Direct Assay</p> <p>Used to indicate a direct assay for the function, process or component indicated by the GO term.</p> <p>More information in the <a href="http://geneontology.org/page/guide-go-evidence-codes#ida">GO evidence code guide</a></p> Inferred from direct assayⁱ

   • 17336988

7. spherical high-density lipoprotein particle Source: BHF-UCL

   <p>Inferred from Direct Assay</p> <p>Used to indicate a direct assay for the function, process or component indicated by the GO term.</p> <p>More information in the <a href="http://geneontology.org/page/guide-go-evidence-codes#ida">GO evidence code guide</a></p> Inferred from direct assayⁱ

   • 17438339

8. very-low-density lipoprotein particle Source: BHF-UCL

   <p>Inferred from Direct Assay</p> <p>Used to indicate a direct assay for the function, process or component indicated by the GO term.</p> <p>More information in the <a href="http://geneontology.org/page/guide-go-evidence-codes#ida">GO evidence code guide</a></p> Inferred from direct assayⁱ

   • 16935699
   • 17154273
   • 3973011

<p>UniProtKB Keywords constitute a <a target="_top" href="/keywords">controlled vocabulary</a> with a hierarchical structure. Keywords summarise the content of a UniProtKB entry and facilitate the search for proteins of interest.<p><a href='../help/keywords' target='_top'>More...</a></p>Keywords - Cellular componentⁱ

<p>Provides information on the disease(s) and phenotype(s) associated with the deficiency of a protein.</p><p><a href='../manual/pathology_and_biotech_section' target='_top'>More...</a></p>Pathology & Biotechⁱ

<p>Provides information on the disease(s) associated with genetic variations in a given protein. The information is extracted from the scientific literature and diseases that are also described in the <a href="http://www.ncbi.nlm.nih.gov/sites/entrez?db=omim"><span class="caps">OMIM</span></a> database are represented with a <a href="/diseases">controlled vocabulary</a> in the following way:</p><p><a href='../manual/involvement_in_disease' target='_top'>More...</a></p>Involvement in diseaseⁱ

Hyperalphalipoproteinemia 2 (HALP2)

[MIM:614028]: A condition characterized by high levels of high density lipoprotein (HDL) and increased HDL cholesterol levels.1 Publication

<p>Manually curated information for which there is published experimental evidence.</p> <p><a href="/manual/evidences#ECO:0000269">More…</a></p> Manual assertion based on experiment inⁱ

• Ref.15

  "Apolipoprotein C-III(Lys-58-->Glu). Identification of an apolipoprotein C-III variant in a family with hyperalphalipoproteinemia."
  von Eckardstein A., Holz H., Sandkamp M., Weng W., Funke H., Assmann G.
  J. Clin. Invest. 87:1724-1731(1991) [PubMed] [Europe PMC] [Abstract]

  Cited for: VARIANT HALP2 GLU-78.

Note: The disease is caused by mutations affecting the gene represented in this entry.

Feature key	Position(s)	Length	Description	Graphical view	Feature identifier	Actions
<p>Describes natural variant(s) of the protein sequence.</p><p><a href='../manual/variant' target='_top'>More...</a></p>Natural varianti	78 – 78	1	K → E in HALP2. 1 Publication <p>Manually curated information for which there is published experimental evidence.</p> <p><a href="/manual/evidences#ECO:0000269">More…</a></p> Manual assertion based on experiment ini Ref.15 "Apolipoprotein C-III(Lys-58-->Glu). Identification of an apolipoprotein C-III variant in a family with hyperalphalipoproteinemia." von Eckardstein A., Holz H., Sandkamp M., Weng W., Funke H., Assmann G. J. Clin. Invest. 87:1724-1731(1991) [PubMed] [Europe PMC] [Abstract] Cited for: VARIANT HALP2 GLU-78.		VAR_000643

<p>UniProtKB Keywords constitute a <a target="_top" href="/keywords">controlled vocabulary</a> with a hierarchical structure. Keywords summarise the content of a UniProtKB entry and facilitate the search for proteins of interest.<p><a href='../help/keywords' target='_top'>More...</a></p>Keywords - Diseaseⁱ

Organism-specific databases

<p>Describes post-translational modifications (PTMs) and/or processing events.</p><p><a href='../manual/ptm_processing_section' target='_top'>More...</a></p>PTM / Processingⁱ

Molecule processing

Feature key	Position(s)	Length	Description	Graphical view	Feature identifier	Actions
<p>Denotes the presence of an N-terminal signal peptide.</p><p><a href='../manual/signal' target='_top'>More...</a></p>Signal peptidei	1 – 20	20	2 Publications <p>Manually curated information for which there is published experimental evidence.</p> <p><a href="/manual/evidences#ECO:0000269">More…</a></p> Manual assertion based on experiment ini Ref.7 "Amino acid sequence of human plasma apolipoprotein C-III from normolipidemic subjects." Hospattankar A.V., Brewer H.B. Jr., Ronan R., Fairwell T. FEBS Lett. 197:67-73(1986) [PubMed] [Europe PMC] [Abstract] Cited for: PROTEIN SEQUENCE OF 21-99. Ref.8 "The complete amino acid sequence of alanine apolipoprotein (apoC-3), and apolipoprotein from human plasma very low density lipoproteins." Brewer H.B. Jr., Shulman R., Herbert P., Ronan R., Wehrly K. J. Biol. Chem. 249:4975-4984(1974) [PubMed] [Europe PMC] [Abstract] Cited for: PROTEIN SEQUENCE OF 21-99.			Add BLAST
<p>Describes the extent of a polypeptide chain in the mature protein following processing.</p><p><a href='../manual/chain' target='_top'>More...</a></p>Chaini	21 – 99	79	Apolipoprotein C-III1 Publication <p>Manually curated information for which there is published experimental evidence.</p> <p><a href="/manual/evidences#ECO:0000269">More…</a></p> Manual assertion based on experiment ini Ref.7 "Amino acid sequence of human plasma apolipoprotein C-III from normolipidemic subjects." Hospattankar A.V., Brewer H.B. Jr., Ronan R., Fairwell T. FEBS Lett. 197:67-73(1986) [PubMed] [Europe PMC] [Abstract] Cited for: PROTEIN SEQUENCE OF 21-99.		PRO_0000002031	Add BLAST

Amino acid modifications

Feature key	Position(s)	Length	Description	Graphical view	Feature identifier	Actions
<p>Specifies the position and type of each covalently attached glycan group (mono-, di- , or polysaccharide).</p><p><a href='../manual/carbohyd' target='_top'>More...</a></p>Glycosylationi	94 – 94	1	O-linked (GalNAc...)3 Publications <p>Manually curated information for which there is published experimental evidence.</p> <p><a href="/manual/evidences#ECO:0000269">More…</a></p> Manual assertion based on experiment ini Ref.10 "Enrichment of glycopeptides for glycan structure and attachment site identification." Nilsson J., Rueetschi U., Halim A., Hesse C., Carlsohn E., Brinkmalm G., Larson G. Nat. Methods 6:809-811(2009) [PubMed] [Europe PMC] [Abstract] Cited for: GLYCOSYLATION [LARGE SCALE ANALYSIS] AT THR-94, STRUCTURE OF CARBOHYDRATES. Ref.13 "Identification of new apolipoprotein-CIII glycoforms with ultrahigh resolution MALDI-FTICR mass spectrometry of human sera." Nicolardi S., van der Burgt Y.E., Dragan I., Hensbergen P.J., Deelder A.M. J. Proteome Res. 12:2260-2268(2013) [PubMed] [Europe PMC] [Abstract] Cited for: GLYCOSYLATION AT THR-94, STRUCTURE OF CARBOHYDRATES, IDENTIFICATION BY MASS SPECTROMETRY. Ref.14 "Molecular cloning of a human apoC-III variant: Thr 74-->Ala 74 mutation prevents O-glycosylation." Maeda H., Hashimoto R.K., Oguro T., Hiraga S., Uzawa H. J. Lipid Res. 28:1405-1409(1987) [PubMed] [Europe PMC] [Abstract] Cited for: VARIANT C-III-0 ALA-94, GLYCOSYLATION AT THR-94.		CAR_000168

<p>Describes post-translational modifications (PTMs). This subsection complements the information provided at the sequence level or describes modifications for which position-specific data is not yet available.</p><p><a href='../manual/post-translational_modification' target='_top'>More...</a></p>Post-translational modificationⁱ

<p>UniProtKB Keywords constitute a <a target="_top" href="/keywords">controlled vocabulary</a> with a hierarchical structure. Keywords summarise the content of a UniProtKB entry and facilitate the search for proteins of interest.<p><a href='../help/keywords' target='_top'>More...</a></p>Keywords - PTMⁱ

Proteomic databases

2D gel databases

PTM databases

<p>Provides information on the expression of a gene at the mRNA or protein level in cells or in tissues of multicellular organisms.</p><p><a href='../manual/expression_section' target='_top'>More...</a></p>Expressionⁱ

<p>Provides information on the expression of a gene at the mRNA or protein level in cells or in tissues of multicellular organisms. By default, the information is derived from experiments at the mRNA level, unless specified ‘at the protein level’.</p><p><a href='../manual/tissue_specificity' target='_top'>More...</a></p>Tissue specificityⁱ

Gene expression databases

<p>Provides information on the quaternary structure of a protein and on interaction(s) with other proteins or protein complexes.</p><p><a href='../manual/interaction_section' target='_top'>More...</a></p>Interactionⁱ

Protein-protein interaction databases

<p>Provides information on the tertiary structure of a protein.</p><p><a href='../manual/structure_section' target='_top'>More...</a></p>Structureⁱ

Secondary structure

Feature key	Position(s)	Length	Description	Graphical view	Feature identifier	Actions
<p>Is used to indicate the positions of experimentally determined helical regions within the protein sequence.</p><p><a href='../manual/helix' target='_top'>More...</a></p>Helixi	29 – 39	11	Combined sources <p>Manually validated information inferred from a combination of experimental and computational evidence.</p> <p><a href="/manual/evidences#ECO:0000244">More…</a></p> Manual assertion inferred from combination of experimental and computational evidencei PDB:2JQ3
<p>Is used to indicate the positions of experimentally determined helical regions within the protein sequence.</p><p><a href='../manual/helix' target='_top'>More...</a></p>Helixi	40 – 42	3	Combined sources <p>Manually validated information inferred from a combination of experimental and computational evidence.</p> <p><a href="/manual/evidences#ECO:0000244">More…</a></p> Manual assertion inferred from combination of experimental and computational evidencei PDB:2JQ3
<p>Is used to indicate the positions of experimentally determined helical regions within the protein sequence.</p><p><a href='../manual/helix' target='_top'>More...</a></p>Helixi	43 – 48	6	Combined sources <p>Manually validated information inferred from a combination of experimental and computational evidence.</p> <p><a href="/manual/evidences#ECO:0000244">More…</a></p> Manual assertion inferred from combination of experimental and computational evidencei PDB:2JQ3
<p>Is used to indicate the positions of experimentally determined helical regions within the protein sequence.</p><p><a href='../manual/helix' target='_top'>More...</a></p>Helixi	49 – 55	7	Combined sources <p>Manually validated information inferred from a combination of experimental and computational evidence.</p> <p><a href="/manual/evidences#ECO:0000244">More…</a></p> Manual assertion inferred from combination of experimental and computational evidencei PDB:2JQ3
<p>Is used to indicate the positions of experimentally determined helical regions within the protein sequence.</p><p><a href='../manual/helix' target='_top'>More...</a></p>Helixi	56 – 62	7	Combined sources <p>Manually validated information inferred from a combination of experimental and computational evidence.</p> <p><a href="/manual/evidences#ECO:0000244">More…</a></p> Manual assertion inferred from combination of experimental and computational evidencei PDB:2JQ3
<p>Is used to indicate the positions of experimentally determined hydrogen-bonded turns within the protein sequence. These elements correspond to the <span class="caps">DSSP</span> secondary structure code ‘T’.</p><p><a href='../manual/turn' target='_top'>More...</a></p>Turni	63 – 68	6	Combined sources <p>Manually validated information inferred from a combination of experimental and computational evidence.</p> <p><a href="/manual/evidences#ECO:0000244">More…</a></p> Manual assertion inferred from combination of experimental and computational evidencei PDB:2JQ3
<p>Is used to indicate the positions of experimentally determined helical regions within the protein sequence.</p><p><a href='../manual/helix' target='_top'>More...</a></p>Helixi	69 – 80	12	Combined sources <p>Manually validated information inferred from a combination of experimental and computational evidence.</p> <p><a href="/manual/evidences#ECO:0000244">More…</a></p> Manual assertion inferred from combination of experimental and computational evidencei PDB:2JQ3
<p>Is used to indicate the positions of experimentally determined helical regions within the protein sequence.</p><p><a href='../manual/helix' target='_top'>More...</a></p>Helixi	83 – 85	3	Combined sources <p>Manually validated information inferred from a combination of experimental and computational evidence.</p> <p><a href="/manual/evidences#ECO:0000244">More…</a></p> Manual assertion inferred from combination of experimental and computational evidencei PDB:2JQ3
<p>Is used to indicate the positions of experimentally determined helical regions within the protein sequence.</p><p><a href='../manual/helix' target='_top'>More...</a></p>Helixi	93 – 98	6	Combined sources <p>Manually validated information inferred from a combination of experimental and computational evidence.</p> <p><a href="/manual/evidences#ECO:0000244">More…</a></p> Manual assertion inferred from combination of experimental and computational evidencei PDB:2JQ3

3D structure databases

Miscellaneous databases

<p>Provides information on sequence similarities with other proteins and the domain(s) present in a protein.</p><p><a href='../manual/family_and_domains_section' target='_top'>More...</a></p>Family & Domainsⁱ

Region

Feature key	Position(s)	Length	Description	Graphical view	Feature identifier	Actions
<p>Describes a region of interest that cannot be described in other subsections.</p><p><a href='../manual/region' target='_top'>More...</a></p>Regioni	68 – 99	32	Lipid-binding			Add BLAST

<p>Provides information about the sequence similarity with other proteins.</p><p><a href='../manual/sequence_similarities' target='_top'>More...</a></p>Sequence similaritiesⁱ

<p>UniProtKB Keywords constitute a <a target="_top" href="/keywords">controlled vocabulary</a> with a hierarchical structure. Keywords summarise the content of a UniProtKB entry and facilitate the search for proteins of interest.<p><a href='../help/keywords' target='_top'>More...</a></p>Keywords - Domainⁱ

Phylogenomic databases

Family and domain databases

<p>Displays by default the canonical protein sequence and upon request all isoforms described in the entry. It also includes information pertinent to the sequence(s), including length and molecular weight.</p><p><a href='../manual/sequences_section' target='_top'>More...</a></p>Sequenceⁱ

<p>Indicates if the canonical sequence displayed by default in the entry is complete or not.</p><p><a href='../manual/sequence_status' target='_top'>More...</a></p>Sequence statusⁱ: Complete.

<p>Indicates if the canonical sequence displayed by default in the entry is in its mature form or if it represents the precursor.</p><p><a href='../manual/sequence_processing' target='_top'>More...</a></p>Sequence processingⁱ: The displayed sequence is further processed into a mature form.

        10         20         30         40         50
MQPRVLLVVA LLALLASARA SEAEDASLLS FMQGYMKHAT KTAKDALSSV 
        60         70         80         90 
QESQVAQQAR GWVTDGFSSL KDYWSTVKDK FSEFWDLDPE VRPTSAVAA 

Experimental Info

Feature key	Position(s)	Length	Description	Graphical view	Feature identifier	Actions
<p>Reports difference(s) between the canonical sequence (displayed by default in the entry) and the different sequence submissions merged in the entry. These various submissions may originate from different sequencing projects, different types of experiments, or different biological samples. Sequence conflicts are usually of unknown origin.</p><p><a href='../manual/conflict' target='_top'>More...</a></p>Sequence conflicti	52 – 53	2	ES → SQ AA sequence (PubMed:4846755)Curated
<p>Reports difference(s) between the canonical sequence (displayed by default in the entry) and the different sequence submissions merged in the entry. These various submissions may originate from different sequencing projects, different types of experiments, or different biological samples. Sequence conflicts are usually of unknown origin.</p><p><a href='../manual/conflict' target='_top'>More...</a></p>Sequence conflicti	57 – 59	3	QQA → AQQ AA sequence (PubMed:4846755)Curated

Natural variant

Feature key	Position(s)	Length	Description	Graphical view	Feature identifier	Actions
<p>Describes natural variant(s) of the protein sequence.</p><p><a href='../manual/variant' target='_top'>More...</a></p>Natural varianti	78 – 78	1	K → E in HALP2. 1 Publication <p>Manually curated information for which there is published experimental evidence.</p> <p><a href="/manual/evidences#ECO:0000269">More…</a></p> Manual assertion based on experiment ini Ref.15 "Apolipoprotein C-III(Lys-58-->Glu). Identification of an apolipoprotein C-III variant in a family with hyperalphalipoproteinemia." von Eckardstein A., Holz H., Sandkamp M., Weng W., Funke H., Assmann G. J. Clin. Invest. 87:1724-1731(1991) [PubMed] [Europe PMC] [Abstract] Cited for: VARIANT HALP2 GLU-78.		VAR_000643
<p>Describes natural variant(s) of the protein sequence.</p><p><a href='../manual/variant' target='_top'>More...</a></p>Natural varianti	94 – 94	1	T → A in C-III-0; unglycosylated. 1 Publication <p>Manually curated information for which there is published experimental evidence.</p> <p><a href="/manual/evidences#ECO:0000269">More…</a></p> Manual assertion based on experiment ini Ref.14 "Molecular cloning of a human apoC-III variant: Thr 74-->Ala 74 mutation prevents O-glycosylation." Maeda H., Hashimoto R.K., Oguro T., Hiraga S., Uzawa H. J. Lipid Res. 28:1405-1409(1987) [PubMed] [Europe PMC] [Abstract] Cited for: VARIANT C-III-0 ALA-94, GLYCOSYLATION AT THR-94.		VAR_000644

Sequence databases

Genome annotation databases

Polymorphism databases

<p>UniProtKB Keywords constitute a <a target="_top" href="/keywords">controlled vocabulary</a> with a hierarchical structure. Keywords summarise the content of a UniProtKB entry and facilitate the search for proteins of interest.<p><a href='../help/keywords' target='_top'>More...</a></p>Keywords - Coding sequence diversityⁱ

<p>Is used to point to information related to entries and found in data collections other than UniProtKB.</p><p><a href='../manual/cross_references_section' target='_top'>More...</a></p> Cross-referencesⁱ

Sequence databases

3D structure databases

Protein-protein interaction databases

PTM databases

Polymorphism databases

2D gel databases

Proteomic databases

Protocols and materials databases

Genome annotation databases

Organism-specific databases

Phylogenomic databases

Enzyme and pathway databases

Miscellaneous databases

Gene expression databases

Family and domain databases

<p>Contains the literature citations that are the sources of data used to annotate the entry. Each reference is numbered and contains several subsections allowing a precise description of a given citation.</p><p><a href='../manual/publications_section' target='_top'>More...</a></p>Publicationsⁱ

1. "Isolation and sequence analysis of the human apolipoprotein CIII gene and the intergenic region between the apo AI and apo CIII genes."
   Protter A.A., Levy-Wilson B., Miller J., Bencen G., White T., Seilhamer J.J.
   DNA 3:449-456(1984) [PubMed] [Europe PMC] [Abstract]
   Cited for: NUCLEOTIDE SEQUENCE [GENOMIC DNA / MRNA].
2. "Isolation and DNA sequence of full-length cDNA for human preapolipoprotein CIII."
   Levy-Wilson B., Appleby V., Protter A.A., Auperin D., Seilhamer J.J.
   DNA 3:359-364(1984) [PubMed] [Europe PMC] [Abstract]
   Cited for: NUCLEOTIDE SEQUENCE [MRNA].
3. "Isolation and characterization of cDNA clones corresponding to two different human apoC-III alleles."
   Karathanasis S.K., Zannis V.I., Breslow J.L.
   J. Lipid Res. 26:451-456(1985) [PubMed] [Europe PMC] [Abstract]
   Cited for: NUCLEOTIDE SEQUENCE [GENOMIC DNA / MRNA].
4. "Human apolipoproteins AI, AII, CII and CIII. cDNA sequences and mRNA abundance."
   Sharpe C.R., Sidoli A., Shelley C.S., Lucero M.A., Shoulders C.C., Baralle F.E.
   Nucleic Acids Res. 12:3917-3932(1984) [PubMed] [Europe PMC] [Abstract]
   Cited for: NUCLEOTIDE SEQUENCE [GENOMIC DNA], TISSUE SPECIFICITY.
5. "The effects of scale: variation in the APOA1/C3/A4/A5 gene cluster."
   Fullerton S.M., Buchanan A.V., Sonpar V.A., Taylor S.L., Smith J.D., Carlson C.S., Salomaa V., Stengaard J.H., Boerwinkle E., Clark A.G., Nickerson D.A., Weiss K.M.
   Hum. Genet. 115:36-56(2004) [PubMed] [Europe PMC] [Abstract]
   Cited for: NUCLEOTIDE SEQUENCE [GENOMIC DNA].
6. "The status, quality, and expansion of the NIH full-length cDNA project: the Mammalian Gene Collection (MGC)."
   The MGC Project Team
   Genome Res. 14:2121-2127(2004) [PubMed] [Europe PMC] [Abstract]
   Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE MRNA].
   Tissue: Pancreas and Spleen.
   
7. "Amino acid sequence of human plasma apolipoprotein C-III from normolipidemic subjects."
   Hospattankar A.V., Brewer H.B. Jr., Ronan R., Fairwell T.
   FEBS Lett. 197:67-73(1986) [PubMed] [Europe PMC] [Abstract]
   Cited for: PROTEIN SEQUENCE OF 21-99.
8. "The complete amino acid sequence of alanine apolipoprotein (apoC-3), and apolipoprotein from human plasma very low density lipoproteins."
   Brewer H.B. Jr., Shulman R., Herbert P., Ronan R., Wehrly K.
   J. Biol. Chem. 249:4975-4984(1974) [PubMed] [Europe PMC] [Abstract]
   Cited for: PROTEIN SEQUENCE OF 21-99.
9. "An ABC of apolipoprotein C-III: a clinically useful new cardiovascular risk factor?"
   Chan D.C., Chen M.M., Ooi E.M., Watts G.F.
   Int. J. Clin. Pract. 62:799-809(2008) [PubMed] [Europe PMC] [Abstract]
   Cited for: REVIEW.
10. "Enrichment of glycopeptides for glycan structure and attachment site identification."
    Nilsson J., Rueetschi U., Halim A., Hesse C., Carlsohn E., Brinkmalm G., Larson G.
    Nat. Methods 6:809-811(2009) [PubMed] [Europe PMC] [Abstract]
    Cited for: GLYCOSYLATION [LARGE SCALE ANALYSIS] AT THR-94, STRUCTURE OF CARBOHYDRATES.
    Tissue: Cerebrospinal fluid.
    
11. "Initial characterization of the human central proteome."
    Burkard T.R., Planyavsky M., Kaupe I., Breitwieser F.P., Buerckstuemmer T., Bennett K.L., Superti-Furga G., Colinge J.
    BMC Syst. Biol. 5:17-17(2011) [PubMed] [Europe PMC] [Abstract]
    Cited for: IDENTIFICATION BY MASS SPECTROMETRY [LARGE SCALE ANALYSIS].
12. "Apolipoprotein C-III and hepatic triglyceride-rich lipoprotein production."
    Yao Z., Wang Y.
    Curr. Opin. Lipidol. 23:206-212(2012) [PubMed] [Europe PMC] [Abstract]
    Cited for: REVIEW.
13. "Identification of new apolipoprotein-CIII glycoforms with ultrahigh resolution MALDI-FTICR mass spectrometry of human sera."
    Nicolardi S., van der Burgt Y.E., Dragan I., Hensbergen P.J., Deelder A.M.
    J. Proteome Res. 12:2260-2268(2013) [PubMed] [Europe PMC] [Abstract]
    Cited for: GLYCOSYLATION AT THR-94, STRUCTURE OF CARBOHYDRATES, IDENTIFICATION BY MASS SPECTROMETRY.
14. "Molecular cloning of a human apoC-III variant: Thr 74-->Ala 74 mutation prevents O-glycosylation."
    Maeda H., Hashimoto R.K., Oguro T., Hiraga S., Uzawa H.
    J. Lipid Res. 28:1405-1409(1987) [PubMed] [Europe PMC] [Abstract]
    Cited for: VARIANT C-III-0 ALA-94, GLYCOSYLATION AT THR-94.
15. "Apolipoprotein C-III(Lys-58-->Glu). Identification of an apolipoprotein C-III variant in a family with hyperalphalipoproteinemia."
    von Eckardstein A., Holz H., Sandkamp M., Weng W., Funke H., Assmann G.
    J. Clin. Invest. 87:1724-1731(1991) [PubMed] [Europe PMC] [Abstract]
    Cited for: VARIANT HALP2 GLU-78.

<p>Provides general information on the entry.</p><p><a href='../manual/entry_information_section' target='_top'>More...</a></p>Entry informationⁱ

<p>Contains any relevant information that doesn’t fit in any other defined sections</p><p><a href='../manual/miscellaneous_section' target='_top'>More...</a></p>Miscellaneousⁱ

<p>UniProtKB Keywords constitute a <a target="_top" href="/keywords">controlled vocabulary</a> with a hierarchical structure. Keywords summarise the content of a UniProtKB entry and facilitate the search for proteins of interest.<p><a href='../help/keywords' target='_top'>More...</a></p>Keywords - Technical termⁱ

Documents

1. Human chromosome 11
   Human chromosome 11: entries, gene names and cross-references to MIM
2. Human entries with polymorphisms or disease mutations
   List of human entries with polymorphisms or disease mutations
3. Human polymorphisms and disease mutations
   Index of human polymorphisms and disease mutations
4. MIM cross-references
   Online Mendelian Inheritance in Man (MIM) cross-references in UniProtKB/Swiss-Prot
5. PDB cross-references
   Index of Protein Data Bank (PDB) cross-references
6. SIMILARITY comments
   Index of protein domains and families

External Data

<p>Provides links to the UniProt Reference Clusters (<a href="/help/uniref">UniRef</a>). UniRef consists of clusters for UniProtKB sequences (including isoforms) and selected UniParc sequences, in order to obtain complete coverage of the sequence space at resolutions of 100%, 90% and 50% identity.</p><p><a href='../manual/similar_proteins_section' target='_top'>More...</a></p>Similar proteinsⁱ