Q9UIQ6 (LCAP_HUMAN) Reviewed, UniProtKB/Swiss-Prot
Last modified
May 1, 2013.
Version 129.
History...
Names·Attributes·General annotation·Ontologies·Alt products·Sequence annotation·Sequences·References·Cross-refs·Entry info·DocumentsCustomize order
Names·Attributes·General annotation·Ontologies·Alt products·Sequence annotation·Sequences·References·Cross-refs·Entry info·DocumentsCustomize orderNames and origin
| Protein names | Recommended name: Leucyl-cystinyl aminopeptidase Short name=Cystinyl aminopeptidase EC=3.4.11.3 Alternative name(s): Insulin-regulated membrane aminopeptidase Insulin-responsive aminopeptidase Short name=IRAP Oxytocinase Short name=OTase Placental leucine aminopeptidase Short name=P-LAP Cleaved into the following chain: | ||||
| Gene names |
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| Organism | Homo sapiens (Human) [Reference proteome] | ||||
| Taxonomic identifier | 9606 [NCBI] | ||||
| Taxonomic lineage | Eukaryota › Metazoa › Chordata › Craniata › Vertebrata › Euteleostomi › Mammalia › Eutheria › Euarchontoglires › Primates › Haplorrhini › Catarrhini › Hominidae › Homo![]() |
Protein attributes
| Sequence length | 1025 AA. |
| Sequence status | Complete. |
| Sequence processing | The displayed sequence is further processed into a mature form. |
| Protein existence | Evidence at protein level |
General annotation (Comments)
| Function | Release of an N-terminal amino acid, cleaves before cysteine, leucine as well as other amino acids. Degrades peptide hormones such as oxytocin, vasopressin and angiotensin III, and plays a role in maintaining homeostasis during pregnancy. May be involved in the inactivation of neuronal peptides in the brain. Cleaves Met-enkephalin and dynorphin. Binds angiotensin IV and may be the angiotensin IV receptor in the brain. Ref.4 Ref.7 Ref.8 |
| Catalytic activity | Release of an N-terminal amino acid, Cys-|-Xaa-, in which the half-cystine residue is involved in a disulfide loop, notably in oxytocin or vasopressin. Hydrolysis rates on a range of aminoacyl arylamides exceed that for the cystinyl derivative, however. Ref.4 Ref.7 |
| Cofactor | Binds 1 zinc ion per subunit By similarity. |
| Subunit structure | Homodimer. Binds tankyrases 1 and 2. |
| Subcellular location | Cell membrane; Single-pass type II membrane protein. Note: In brain only the membrane-bound form is found. The protein resides in intracellular vesicles together with GLUT4 and can then translocate to the cell surface in response to insulin and/or oxytocin. Localization may be determined by dileucine internalization motifs, and/or by interaction with tankyrases. Ref.4 Leucyl-cystinyl aminopeptidase, pregnancy serum form: Secreted. Note: During pregnancy serum levels are low in the first trimester, rise progressively during the second and third trimester and decrease rapidly after parturition. Ref.4 |
| Tissue specificity | Highly expressed in placenta, heart, kidney and small intestine. Detected at lower levels in neuronal cells in the brain, in skeletal muscle, spleen, liver, testes and colon. Ref.1 Ref.2 Ref.4 |
| Post-translational modification | The pregnancy serum form is derived from the membrane-bound form by proteolytic processing. N-glycosylated. |
| Sequence similarities | Belongs to the peptidase M1 family. |
| Sequence caution | The sequence BAA09436.1 differs from that shown. Reason: Erroneous initiation. The sequence BAD92120.1 differs from that shown. Reason: Frameshift at position 405. |
Ontologies
Alternative products
| This entry describes 3 isoforms produced by alternative splicing. [Align] [Select] Note: Experimental confirmation may be lacking for some isoforms. | ||||||
| Isoform 1 (identifier: Q9UIQ6-1) This isoform has been chosen as the 'canonical' sequence. All positional information in this entry refers to it. This is also the sequence that appears in the downloadable versions of the entry. | ||||||
| Isoform 2 (identifier: Q9UIQ6-2) The sequence of this isoform differs from the canonical sequence as follows: 1-14: Missing. | ||||||
| Isoform 3 (identifier: Q9UIQ6-3) The sequence of this isoform differs from the canonical sequence as follows: 1-19: Missing. |
Sequence annotation (Features)
| Feature key | Position(s) | Length | Description | Graphical view | Feature identifier | ||||
Molecule processing | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Chain | 1 – 1025 | 1025 | Leucyl-cystinyl aminopeptidase | PRO_0000095114 | |||||
| Chain | 155 – 1025 | 871 | Leucyl-cystinyl aminopeptidase, pregnancy serum form | PRO_0000292264 | |||||
Regions | |||||||||
| Topological domain | 1 – 110 | 110 | Cytoplasmic Potential | ||||||
| Transmembrane | 111 – 131 | 21 | Helical; Signal-anchor for type II membrane protein; Potential | ||||||
| Topological domain | 132 – 1025 | 894 | Extracellular Potential | ||||||
| Region | 96 – 101 | 6 | Tankyrase binding | ||||||
| Region | 428 – 432 | 5 | Substrate binding By similarity | ||||||
| Motif | 53 – 54 | 2 | Dileucine internalization motif Potential | ||||||
| Motif | 76 – 77 | 2 | Dileucine internalization motif Potential | ||||||
Sites | |||||||||
| Active site | 465 | 1 | Proton acceptor By similarity | ||||||
| Metal binding | 464 | 1 | Zinc; catalytic By similarity | ||||||
| Metal binding | 468 | 1 | Zinc; catalytic By similarity | ||||||
| Metal binding | 487 | 1 | Zinc; catalytic By similarity | ||||||
| Binding site | 295 | 1 | Substrate By similarity | ||||||
| Site | 154 – 155 | 2 | Cleavage; to produce pregnancy serum form | ||||||
| Site | 549 | 1 | Transition state stabilizer By similarity | ||||||
Amino acid modifications | |||||||||
| Modified residue | 80 | 1 | Phosphoserine By similarity | ||||||
| Modified residue | 91 | 1 | Phosphoserine By similarity | ||||||
| Glycosylation | 145 | 1 | N-linked (GlcNAc...) Potential | ||||||
| Glycosylation | 184 | 1 | N-linked (GlcNAc...) Ref.10 | ||||||
| Glycosylation | 215 | 1 | N-linked (GlcNAc...) Potential | ||||||
| Glycosylation | 256 | 1 | N-linked (GlcNAc...) Potential | ||||||
| Glycosylation | 266 | 1 | N-linked (GlcNAc...) Potential | ||||||
| Glycosylation | 368 | 1 | N-linked (GlcNAc...) Potential | ||||||
| Glycosylation | 374 | 1 | N-linked (GlcNAc...) Potential | ||||||
| Glycosylation | 448 | 1 | N-linked (GlcNAc...) Ref.10 | ||||||
| Glycosylation | 525 | 1 | N-linked (GlcNAc...) Potential | ||||||
| Glycosylation | 578 | 1 | N-linked (GlcNAc...) Potential | ||||||
| Glycosylation | 598 | 1 | N-linked (GlcNAc...) Potential | ||||||
| Glycosylation | 664 | 1 | N-linked (GlcNAc...) Potential | ||||||
| Glycosylation | 682 | 1 | N-linked (GlcNAc...) Ref.10 | ||||||
| Glycosylation | 760 | 1 | N-linked (GlcNAc...) Potential | ||||||
| Glycosylation | 834 | 1 | N-linked (GlcNAc...) Potential | ||||||
| Glycosylation | 850 | 1 | N-linked (GlcNAc...) Ref.10 | ||||||
| Glycosylation | 989 | 1 | N-linked (GlcNAc...) Potential | ||||||
Natural variations | |||||||||
| Alternative sequence | 1 – 19 | 19 | Missing in isoform 3. | VSP_005449 | |||||
| Alternative sequence | 1 – 14 | 14 | Missing in isoform 2. | VSP_005448 | |||||
| Natural variant | 86 | 1 | S → P. Corresponds to variant rs3797799 [ dbSNP | Ensembl ]. | VAR_031616 | |||||
| Natural variant | 594 | 1 | N → I. Corresponds to variant rs12520455 [ dbSNP | Ensembl ]. | VAR_051567 | |||||
| Natural variant | 763 | 1 | A → T. Corresponds to variant rs2303138 [ dbSNP | Ensembl ]. | VAR_012812 | |||||
| Natural variant | 913 | 1 | S → T. Corresponds to variant rs17087233 [ dbSNP | Ensembl ]. | VAR_051568 | |||||
| Natural variant | 963 | 1 | I → V. Corresponds to variant rs11746232 [ dbSNP | Ensembl ]. | VAR_031617 | |||||
Experimental info | |||||||||
| Sequence conflict | 66 | 1 | D → V in CAB61646. Ref.3 | ||||||
| Sequence conflict | 66 | 1 | D → V in CAB94753. Ref.3 | ||||||
| Sequence conflict | 301 | 1 | S → L AA sequence Ref.6 | ||||||
| Sequence conflict | 386 | 1 | K → N in AAB66672. Ref.2 | ||||||
| Sequence conflict | 386 | 1 | K → N in AAB66673. Ref.2 | ||||||
| Sequence conflict | 386 | 1 | K → N in CAB61646. Ref.3 | ||||||
| Sequence conflict | 386 | 1 | K → N in CAB94753. Ref.3 | ||||||
| Sequence conflict | 892 | 1 | K → Q in BAA09436. Ref.1 | ||||||
| Sequence conflict | 944 | 1 | F → L in BAA09436. Ref.1 | ||||||
Sequences
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References
| « Hide 'large scale' references | |
| [1] | "Human placental leucine aminopeptidase/oxytocinase. A new member of type II membrane-spanning zinc metallopeptidase family." Rogi T., Tsujimoto M., Nakazato H., Mizutani S., Tomoda Y. J. Biol. Chem. 271:56-61(1996) [PubMed] [Europe PMC] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [MRNA], PROTEIN SEQUENCE OF 160-168; 319-332; 615-624; 635-647; 798-814 AND 870-880, TISSUE SPECIFICITY. Tissue: Placenta. |
| [2] | "The complete amino acid sequence of human placental oxytocinase." Laustsen P.G., Rasmussen T.E., Petersen K., Pedraza-Diaz S., Moestrup S.K., Gliemann J., Sottrup-Jensen L., Kristensen T. Biochim. Biophys. Acta 1352:1-7(1997) [PubMed] [Europe PMC] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [MRNA] (ISOFORMS 1 AND 2), TISSUE SPECIFICITY. Tissue: Placenta. |
| [3] | "Structure of the human oxytocinase/insulin-regulated aminopeptidase gene and localization to chromosome 5q21." Rasmussen T.E., Pedraza-Diaz S., Hardre R., Laustsen P.G., Carrion A.G., Kristensen T. Eur. J. Biochem. 267:2297-2306(2000) [PubMed] [Europe PMC] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [GENOMIC DNA] (ISOFORMS 1 AND 3). |
| [4] | "Expression of placental leucine aminopeptidase/oxytocinase in neuronal cells and its action on neuronal peptides." Matsumoto H., Nagasaka T., Hattori A., Rogi T., Tsuruoka N., Mizutani S., Tsujimoto M. Eur. J. Biochem. 268:3259-3266(2001) [PubMed] [Europe PMC] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [MRNA] (ISOFORMS 1; 2 AND 3), FUNCTION, CATALYTIC ACTIVITY, SUBCELLULAR LOCATION, TISSUE SPECIFICITY. |
| [5] | Totoki Y., Toyoda A., Takeda T., Sakaki Y., Tanaka A., Yokoyama S., Ohara O., Nagase T., Kikuno R.F. Submitted (MAR-2005) to the EMBL/GenBank/DDBJ databases Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE MRNA] OF 206-1025. Tissue: Brain. |
| [6] | "Pool sequencing of natural HLA-DR, DQ, and DP ligands reveals detailed peptide motifs, constraints of processing, and general rules." Falk K., Roetzschke O., Stevanovic S., Jung G., Rammensee H.G. Immunogenetics 39:230-242(1994) [PubMed] [Europe PMC] [Abstract] Cited for: PROTEIN SEQUENCE OF 285-301 AND 710-724. |
| [7] | "Identification of human placental leucine aminopeptidase as oxytocinase." Tsujimoto M., Mizutani S., Adachi H., Kimura M., Nakazato H., Tomoda Y. Arch. Biochem. Biophys. 292:388-392(1992) [PubMed] [Europe PMC] [Abstract] Cited for: FUNCTION, CATALYTIC ACTIVITY. |
| [8] | "Evidence that the angiotensin IV (AT(4)) receptor is the enzyme insulin-regulated aminopeptidase." Albiston A.L., McDowall S.G., Matsacos D., Sim P., Clune E., Mustafa T., Lee J., Mendelsohn F.A., Simpson R.J., Connolly L.M., Chai S.Y. J. Biol. Chem. 276:48623-48626(2001) [PubMed] [Europe PMC] [Abstract] Cited for: FUNCTION. |
| [9] | "A quantitative atlas of mitotic phosphorylation." Dephoure N., Zhou C., Villen J., Beausoleil S.A., Bakalarski C.E., Elledge S.J., Gygi S.P. Proc. Natl. Acad. Sci. U.S.A. 105:10762-10767(2008) [PubMed] [Europe PMC] [Abstract] Cited for: IDENTIFICATION BY MASS SPECTROMETRY [LARGE SCALE ANALYSIS]. Tissue: Cervix carcinoma. |
| [10] | "Mass-spectrometric identification and relative quantification of N-linked cell surface glycoproteins." Wollscheid B., Bausch-Fluck D., Henderson C., O'Brien R., Bibel M., Schiess R., Aebersold R., Watts J.D. Nat. Biotechnol. 27:378-386(2009) [PubMed] [Europe PMC] [Abstract] Cited for: GLYCOSYLATION [LARGE SCALE ANALYSIS] AT ASN-184; ASN-448; ASN-682 AND ASN-850, MASS SPECTROMETRY. Tissue: Leukemic T-cell. |
| [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]. |
| + | Additional computationally mapped references. |
Cross-references
Sequence databases | |
|---|---|
| EMBL GenBank DDBJ | D50810 mRNA. Translation: BAA09436.1. Different initiation. U62768 mRNA. Translation: AAB66672.1. U62769 mRNA. Translation: AAB66673.1. AJ131023 AJ131039 Genomic DNA. Translation: CAB61646.1.AJ131025 AJ131039 Genomic DNA. Translation: CAB94753.1.AB208883 mRNA. Translation: BAD92120.1. Frameshift. |
| IPI | IPI00221240. IPI00221241. IPI00307017. |
| PIR | A59383. A59384. |
| RefSeq | NP_005566.2. NM_005575.2. NP_787116.2. NM_175920.3. |
| UniGene | Hs.527199. Hs.656905. |
3D structure databases | |
| ProteinModelPortal | Q9UIQ6. |
| ModBase | Search... |
Protein-protein interaction databases | |
| IntAct | Q9UIQ6. 4 interactions. |
| STRING | 9606.ENSP00000231368. |
Protein family/group databases | |
| MEROPS | M01.011. |
PTM databases | |
| PhosphoSite | Q9UIQ6. |
Polymorphism databases | |
| DMDM | 145559489. |
Proteomic databases | |
| PaxDb | Q9UIQ6. |
| PeptideAtlas | Q9UIQ6. |
| PRIDE | Q9UIQ6. |
Protocols and materials databases | |
| DNASU | 4012. |
| StructuralBiologyKnowledgebase | Search... |
Genome annotation databases | |
| Ensembl | ENST00000231368; ENSP00000231368; ENSG00000113441. ENST00000395770; ENSP00000379117; ENSG00000113441. |
| GeneID | 4012. |
| KEGG | hsa:4012. |
| UCSC | uc003kmv.1. human. |
Organism-specific databases | |
| CTD | 4012. |
| GeneCards | GC05P096272. |
| H-InvDB | HIX0005054. |
| HGNC | HGNC:6656. LNPEP. |
| HPA | HPA043642. |
| MIM | 151300. gene. |
| neXtProt | NX_Q9UIQ6. |
| PharmGKB | PA30418. |
| GenAtlas | Search... |
Phylogenomic databases | |
| eggNOG | COG0308. |
| HOVERGEN | HBG108296. |
| InParanoid | Q9UIQ6. |
| KO | K01257. |
| OMA | VTFMSAV. |
| OrthoDB | EOG4HDSSX. |
Enzyme and pathway databases | |
| Pathway_Interaction_DB | insulin_glucose_pathway. Insulin-mediated glucose transport. |
| Reactome | REACT_11123. Membrane Trafficking. REACT_6900. Immune System. |
Gene expression databases | |
| Bgee | Q9UIQ6. |
| CleanEx | HS_LNPEP. |
| Genevestigator | Q9UIQ6. |
| GermOnline | ENSG00000113441. Homo sapiens. |
Family and domain databases | |
| InterPro | IPR024571. DUF3358. IPR001930. Peptidase_M1. IPR014782. Peptidase_M1_N. [Graphical view] |
| PANTHER | PTHR11533. PTHR11533. 1 hit. |
| Pfam | PF11838. DUF3358. 1 hit. PF01433. Peptidase_M1. 1 hit. [Graphical view] |
| PRINTS | PR00756. ALADIPTASE. |
| PROSITE | PS00142. ZINC_PROTEASE. 1 hit. [Graphical view] |
| ProtoNet | Search... |
Other | |
| BindingDB | Q9UIQ6. |
| ChEMBL | CHEMBL2693. |
| GenomeRNAi | 4012. |
| NextBio | 15736. |
| PMAP-CutDB | Q9UIQ6. |
| SOURCE | Search... |
Entry information
| Entry name | LCAP_HUMAN | ||||||||
| Accession | Primary (citable) accession number: Q9UIQ6 Secondary accession number(s): O00769 Q9UIQ7 | ||||||||
| Entry history |
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| Entry status | Reviewed (UniProtKB/Swiss-Prot) | ||||||||
| Annotation program | Chordata Protein Annotation Program | ||||||||
| Disclaimer | Any medical or genetic information present in this entry is provided for research, educational and informational purposes only. It is not in any way intended to be used as a substitute for professional medical advice, diagnosis, treatment or care. | ||||||||
Relevant documents
| Peptidase families Classification of peptidase families and list of entries |
| Human chromosome 5 Human chromosome 5: entries, gene names and cross-references to MIM |
| Human entries with polymorphisms or disease mutations List of human entries with polymorphisms or disease mutations |
| Human polymorphisms and disease mutations Index of human polymorphisms and disease mutations |
| MIM cross-references Online Mendelian Inheritance in Man (MIM) cross-references in UniProtKB/Swiss-Prot |
| SIMILARITY comments Index of protein domains and families |

Clusters with
