Reviewed,
UniProtKB/Swiss-Prot Q9BRK5 (CAB45_HUMAN)
Last modified
June 16, 2009.
Version 76.
History...
Clusters with 100%,
90%,
50% identity |
Documents (4) |
Third-party data |
Customize display | text xml rdf/xml gff fasta |
Names and origin
| Protein names | Recommended name: 45 kDa calcium-binding protein Alternative name(s): Cab45 Stromal cell-derived factor 4 Short name=SDF-4 | ||||||
| Gene names |
| ||||||
| Organism | Homo sapiens (Human) | ||||||
| Taxonomic identifier | 9606 [NCBI] | ||||||
| Taxonomic lineage | Eukaryota › Metazoa › Chordata › Craniata › Vertebrata › Euteleostomi › Mammalia › Eutheria › Euarchontoglires › Primates › Haplorrhini › Catarrhini › Hominidae › Homo |
Protein attributes
| Sequence length | 362 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 | May regulate calcium-dependent activities in the endoplasmic reticulum lumen or post-ER compartment. Isoform 5 may be involved in the exocytosis of zymogens by pancreatic acini By similarity. |
| Cofactor | Binds calcium By similarity. Isoform 5 binds calcium. |
| Subunit structure | Isoform 5 interacts with STXBP1; the interaction is enhanced in presence of calcium. Isoform 5 interacts with STX3. |
| Subcellular location | Isoform 1: Golgi apparatus lumen By similarity. Isoform 5: Cytoplasm. Note: Isoform 5 colocalizes with STX3 and STXBP1 isoform 2 at the plasma membrane and cell surface blebs. |
| Tissue specificity | Ubiquitous. Isoform 5 is expressed in pancreas. |
| Sequence similarities | Belongs to the CREC family. Contains 6 EF-hand domains. |
| Sequence caution | The sequence AAF44350.1 differs from that shown. Reason: Frameshift at position 305. |
Ontologies
| Keywords | |
|---|---|
| Biological process | Exocytosis |
| Cellular component | Cytoplasm Golgi apparatus |
| Coding sequence diversity | Alternative splicing Polymorphism |
| Domain | Repeat Signal |
| Ligand | Calcium |
| PTM | Glycoprotein |
| Gene Ontology (GO) | |
| Biological process | UV protection Inferred from sequence or structural similarity. Source: UniProtKB cerebellum developmentInferred from sequence or structural similarity. Source: UniProtKB fat cell differentiationInferred from sequence or structural similarity. Source: UniProtKB response to ethanolInferred from sequence or structural similarity. Source: UniProtKB |
| Cellular component | Golgi lumen Inferred from sequence or structural similarity. Source: UniProtKB late endosomeInferred from sequence or structural similarity. Source: UniProtKB soluble fractionInferred from sequence or structural similarity. Source: UniProtKB |
| Molecular function | calcium ion binding Inferred from sequence or structural similarity. Source: UniProtKB |
| Complete GO annotation... | |
Alternative products
| This entry describes 5 isoforms produced by alternative splicing. [Align] [Select] | ||||||
| Isoform 1 (identifier: Q9BRK5-1) Also known as: Cab45a; Cab45-G; 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: Q9BRK5-2) The sequence of this isoform differs from the canonical sequence as follows: 1-103: Missing. | ||||||
| Isoform 3 (identifier: Q9BRK5-3) The sequence of this isoform differs from the canonical sequence as follows: 193-254: TQEVLENLKD...LDQDGDKQLS → SCAPLSTGSP...GDRPGPGPGR 255-362: Missing. | ||||||
| Note: No experimental confirmation available. | ||||||
| Isoform 4 (identifier: Q9BRK5-4) The sequence of this isoform differs from the canonical sequence as follows: 193-202: TQEVLENLKD → RHGPPGPRAL 203-362: Missing. | ||||||
| Note: No experimental confirmation available. | ||||||
| Isoform 5 (identifier: Q9BRK5-5) Also known as: Cab45b; Cab45-C; The sequence of this isoform differs from the canonical sequence as follows: 1-232: Missing. | ||||||
| Note: Isoform 5 colocalizes with STX3 and STXBP1 isoform 2 at the plasma membrane and cell surface blebs. |
Sequence annotation (Features)
| Feature key | Position(s) | Length | Description | Graphical view | Feature identifier | ||||
Molecule processing | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Signal peptide | 1 – 36 | 36 | Potential | ||||||
| Chain | 37 – 362 | 326 | 45 kDa calcium-binding protein | PRO_0000004156 | |||||
Regions | |||||||||
| Domain | 98 – 133 | 36 | EF-hand 1 | ||||||
| Domain | 137 – 172 | 36 | EF-hand 2 | ||||||
| Domain | 197 – 232 | 36 | EF-hand 3 | ||||||
| Domain | 233 – 268 | 36 | EF-hand 4 | ||||||
| Domain | 278 – 313 | 36 | EF-hand 5 | ||||||
| Domain | 314 – 349 | 36 | EF-hand 6 | ||||||
| Calcium binding | 111 – 122 | 12 | 1 Potential | ||||||
| Calcium binding | 150 – 161 | 12 | 2 Potential | ||||||
| Calcium binding | 209 – 220 | 12 | 3 Potential | ||||||
| Calcium binding | 246 – 257 | 12 | 4 Potential | ||||||
| Calcium binding | 291 – 302 | 12 | 5 Potential | ||||||
| Calcium binding | 327 – 338 | 12 | 6 Potential | ||||||
| Region | 309 – 362 | 54 | Necessary for intracellular retention in Golgi apparatus lumen By similarity | ||||||
Amino acid modifications | |||||||||
| Glycosylation | 40 | 1 | N-linked (GlcNAc...) Potential | ||||||
Natural variations | |||||||||
| Alternative sequence | 1 – 232 | 232 | Missing in isoform 5. | VSP_037484 | |||||
| Alternative sequence | 1 – 103 | 103 | Missing in isoform 2. | VSP_037485 | |||||
| Alternative sequence | 193 – 254 | 62 | TQEVL…DKQLS → SCAPLSTGSPGEPEGPLVPG GQPPCRPAADGGGVPVGPPP RAQPGNAQVHGEGDRPGPGP GR in isoform 3. | VSP_037486 | |||||
| Alternative sequence | 193 – 202 | 10 | TQEVLENLKD → RHGPPGPRAL in isoform 4. | VSP_037487 | |||||
| Alternative sequence | 203 – 362 | 160 | Missing in isoform 4. | VSP_037488 | |||||
| Alternative sequence | 255 – 362 | 108 | Missing in isoform 3. | VSP_037489 | |||||
| Natural variant | 50 | 1 | N → D: dbSNP rs12745364. | VAR_048659 | |||||
| Natural variant | 148 | 1 | A → T in a colorectal cancer sample; somatic mutation. Ref.13 | VAR_035461 | |||||
Experimental info | |||||||||
| Mutagenesis | 257 | 1 | E → Q: Does not affect calcium-binding. | ||||||
| Mutagenesis | 302 | 1 | E → Q: Inhibits calcium-binding. | ||||||
| Mutagenesis | 338 | 1 | E → Q: Does not affect calcium-binding. | ||||||
| Sequence conflict | 70 – 78 | 9 | DGHLNRGFH → ERALKSGFQ in AAL75950. Ref.2 | ||||||
| Sequence conflict | 86 – 97 | 12 | DLGGF…DAEPR → NLVALIGNGAP in AAL75950. Ref.2 | ||||||
| Sequence conflict | 117 | 1 | K → R in BAC11563. Ref.5 | ||||||
| Sequence conflict | 133 | 1 | E → G in BAC11563. Ref.5 | ||||||
| Sequence conflict | 150 | 1 | D → G in AAL75950. Ref.2 | ||||||
| Sequence conflict | 188 | 1 | K → R in BAG37898. Ref.6 | ||||||
| Sequence conflict | 193 | 1 | T → A in BAD96241. Ref.7 | ||||||
| Sequence conflict | 234 | 1 | L → P in BAD96799. Ref.7 | ||||||
| Sequence conflict | 281 – 282 | 2 | DR → KK in AAL75950. Ref.2 | ||||||
| Sequence conflict | 286 | 1 | F → L in AAL75950. Ref.2 | ||||||
| Sequence conflict | 321 | 1 | Q → R in BAD96799. Ref.7 | ||||||
| Sequence conflict | 322 – 325 | 4 | MIAV → IRL in AAL75950. Ref.2 | ||||||
| Sequence conflict | 356 | 1 | R → S in AAL75950. Ref.2 | ||||||
Sequences
| ||||||||||||||||||||||||||||||||||||||||||
References
| « Hide 'large scale' references | |
| [1] | "Sequence of a human cDNA encoding Cab45, a Ca2+-binding protein with six EF-hand motifs." Koivu T., Laitinen S., Riento K., Olkkonen V.M. DNA Seq. 7:217-220(1997) [PubMed: 9254016] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [MRNA] (ISOFORM 1). |
| [2] | "Cloning of a new human cDNA homologous to Mus musculus calcium-binding protein Cab45b." Yue P., Yu L., Zhao S.Y. Submitted (MAR-1999) to the EMBL/GenBank/DDBJ databases Cited for: NUCLEOTIDE SEQUENCE [MRNA] (ISOFORM 1). |
| [3] | "Novel human calcium-binding protein precursor." Zhang W., Wan T., Yuan Z., Cao X. Submitted (MAY-1999) to the EMBL/GenBank/DDBJ databases Cited for: NUCLEOTIDE SEQUENCE [MRNA] (ISOFORM 3). |
| [4] | "Identification of a novel calcium-binding protein Cab45 from dendritic cells." Zhang W., Wan T., Cao X. Submitted (AUG-1999) to the EMBL/GenBank/DDBJ databases Cited for: NUCLEOTIDE SEQUENCE [MRNA] (ISOFORM 1). |
| [5] | "HRI human cDNA sequencing project." Ota T., Nishikawa T., Suzuki Y., Kawai-Hio Y., Hayashi K., Ishii S., Saito K., Yamamoto J., Wakamatsu A., Nagai T., Nakamura Y., Nagahari K., Sugano S., Isogai T. Submitted (MAR-2002) to the EMBL/GenBank/DDBJ databases Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE MRNA] (ISOFORM 1). Tissue: Teratocarcinoma. |
| [6] | "Complete sequencing and characterization of 21,243 full-length human cDNAs." Ota T., Suzuki Y., Nishikawa T., Otsuki T., Sugiyama T., Irie R., Wakamatsu A., Hayashi K., Sato H., Nagai K., Kimura K., Makita H., Sekine M., Obayashi M., Nishi T., Shibahara T., Tanaka T., Ishii S. Sugano S.Nat. Genet. 36:40-45(2004) [PubMed: 14702039] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE MRNA] (ISOFORMS 1; 2 AND 4). Tissue: Brain and Tongue. |
| [7] | Suzuki Y., Sugano S., Totoki Y., Toyoda A., Takeda T., Sakaki Y., Tanaka A., Yokoyama S. Submitted (APR-2005) to the EMBL/GenBank/DDBJ databases Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE MRNA] (ISOFORM 1). Tissue: Adipose tissue. |
| [8] | "The DNA sequence and biological annotation of human chromosome 1." Gregory S.G., Barlow K.F., McLay K.E., Kaul R., Swarbreck D., Dunham A., Scott C.E., Howe K.L., Woodfine K., Spencer C.C.A., Jones M.C., Gillson C., Searle S., Zhou Y., Kokocinski F., McDonald L., Evans R., Phillips K. Bentley D.R.Nature 441:315-321(2006) [PubMed: 16710414] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA]. |
| [9] | Mural R.J., Istrail S., Sutton G.G., Florea L., Halpern A.L., Mobarry C.M., Lippert R., Walenz B., Shatkay H., Dew I., Miller J.R., Flanigan M.J., Edwards N.J., Bolanos R., Fasulo D., Halldorsson B.V., Hannenhalli S., Turner R. Venter J.C.Submitted (JUL-2005) to the EMBL/GenBank/DDBJ databases Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA]. |
| [10] | "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: 15489334] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE MRNA] (ISOFORM 1). Tissue: Brain, Pancreas and Prostate. |
| [11] | "A cytosolic splice variant of Cab45 interacts with Munc18b and impacts on amylase secretion by pancreatic acini." Lam P.P., Hyvaerinen K., Kauppi M., Cosen-Binker L., Laitinen S., Keraenen S., Gaisano H.Y., Olkkonen V.M. Mol. Biol. Cell 18:2473-2480(2007) [PubMed: 17442889] [Abstract] Cited for: INTERACTION WITH STX3 AND STXBP1, SUBCELLULAR LOCATION, ALTERNATIVE SPLICING (ISOFORM 5), MUTAGENESIS OF GLU-257; GLU-302 AND GLU-338, TISSUE SPECIFICITY. |
| [12] | Colinge J., Superti-Furga G., Bennett K.L. Submitted (OCT-2008) to UniProtKB Cited for: IDENTIFICATION [LARGE SCALE ANALYSIS], MASS SPECTROMETRY. |
| [13] | "The consensus coding sequences of human breast and colorectal cancers." Sjoeblom T., Jones S., Wood L.D., Parsons D.W., Lin J., Barber T.D., Mandelker D., Leary R.J., Ptak J., Silliman N., Szabo S., Buckhaults P., Farrell C., Meeh P., Markowitz S.D., Willis J., Dawson D., Willson J.K.V. Velculescu V.E.Science 314:268-274(2006) [PubMed: 16959974] [Abstract] Cited for: VARIANT [LARGE SCALE ANALYSIS] THR-148. |
Cross-references
Sequence databases | |
|---|---|
| L79912 mRNA. Translation: AAL40084.1. AF132749 mRNA. Translation: AAL75950.1. AF153686 mRNA. Translation: AAD51612.1. AF178986 mRNA. Translation: AAF44350.1. Frameshift. AK075352 mRNA. Translation: BAC11563.1. AK027277 mRNA. Translation: BAB55012.1. AK299810 mRNA. Translation: BAG61683.1. AK315517 mRNA. Translation: BAG37898.1. AK222521 mRNA. Translation: BAD96241.1. AK223079 mRNA. Translation: BAD96799.1. AL162741 Genomic DNA. Translation: CAI23251.1. CH471183 Genomic DNA. Translation: EAW56273.1. BC006211 mRNA. Translation: AAH06211.1. BC007625 mRNA. Translation: AAH07625.1. BC008917 mRNA. Translation: AAH08917.1. BC011244 mRNA. Translation: AAH11244.1. BC022375 mRNA. Translation: AAH22375.1. | |
| IPI | IPI00009794. IPI00106646. IPI00384644. |
| RefSeq | NP_057260.2. NP_057631.1. |
| UniGene | Hs.42806 |
3D structure databases | |
| ModBase | Search... |
PTM databases | |
| PhosphoSite | Q9BRK5. |
Proteomic databases | |
| PRIDE | Q9BRK5. |
Genome annotation databases | |
| Ensembl | ENSG00000078808. Homo sapiens. [Contig view] |
| GeneID | 51150. |
| KEGG | hsa:51150. |
Organism-specific databases | |
| GeneCards | GC01M001143. |
| HGNC | HGNC:24188. SDF4. |
| HPA | CAB015227. |
| PharmGKB | PA142670940. |
| GenAtlas | Search... |
Phylogenomic databases | |
| HOGENOM | Q9BRK5. |
| HOVERGEN | Q9BRK5. |
| OMA | Q9BRK5. HDGIVTM. |
Gene expression databases | |
| ArrayExpress | Q9BRK5. |
| Bgee | Q9BRK5. |
| CleanEx | HS_SDF4. |
| GermOnline | ENSG00000078808. Homo sapiens. |
Family and domain databases | |
| InterPro | IPR011992. EF-Hand_type. IPR018247. EF_HAND_1. IPR018249. EF_HAND_2. IPR002048. EF_hand_Ca_bd. [Graphical view] |
| Gene3D | G3DSA:1.10.238.10. EF-Hand_type. 2 hits. |
| ProDom | PD000012. EF-hand. 1 hit. [Graphical view] [Entries sharing at least one domain] |
| SMART | SM00054. EFh. 5 hits. [Graphical view] |
| PROSITE | PS00018. EF_HAND_1. 5 hits. PS50222. EF_HAND_2. 5 hits. [Graphical view] |
| ProtoNet | Search... |
Other Resources | |
| NextBio | 54034. |
Entry information
| Entry name | CAB45_HUMAN | ||||||||
| Accession | Primary (citable) accession number: Q9BRK5 Secondary accession number(s): B1AME5 Q9UN53 | ||||||||
| Entry history |
| ||||||||
| Entry status | Reviewed (UniProtKB/Swiss-Prot) | ||||||||
| Annotation project | HPI (Human Proteome Initiative) | ||||||||
Relevant documents
| Human chromosome 1 Human chromosome 1: 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 |
| SIMILARITY comments Index of protein domains and families |

Clusters with


