CST5

Cystatin D
PDB rendering based on 1rn7.
Available structures PDB Ortholog search: PDBe, RCSB List of PDB id codes 1RN7​, 1ROA​
Identifiers
Symbols	CST5 ; MGC71922
External IDs	OMIM: 123858 MGI: 1930004 HomoloGene: 55615 GeneCards: CST5 Gene
Gene ontology Molecular function • cysteine-type endopeptidase inhibitor activity • protein binding Cellular component • extracellular region • extracellular exosome Biological process • negative regulation of endopeptidase activity Sources: Amigo / QuickGO
RNA expression pattern
More reference expression data
Orthologs
Species	Human	Mouse
Entrez	1473	58214
Ensembl	ENSG00000170367	ENSMUSG00000033156
UniProt	P28325	Q9JM84
RefSeq (mRNA)	NM_001900	NM_021405
RefSeq (protein)	NP_001891	NP_067380
Location (UCSC)	Chr 20: 23.88 – 23.88 Mb	Chr 2: 149.41 – 149.41 Mb
PubMed search

Cystatin-D is a protein that in humans is encoded by the CST5 gene.^[1][2]

The cystatin superfamily encompasses proteins that contain multiple cystatin-like sequences. Some of the members are active cysteine protease inhibitors, while others have lost or perhaps never acquired this inhibitory activity. There are three inhibitory families in the superfamily, including the type 1 cystatins (stefins), type 2 cystatins and the kininogens. The type 2 cystatin proteins are a class of cysteine proteinase inhibitors found in a variety of human fluids and secretions. The cystatin locus on chromosome 20 contains the majority of the type 2 cystatin genes and pseudogenes. This gene is located in the cystatin locus and encodes a protein found in saliva and tears. The encoded protein may play a protective role against proteinases present in the oral cavity.^[2]

References

1. Freije JP, Abrahamson M, Olafsson I, Velasco G, Grubb A, Lopez-Otin C (Dec 1991). "Structure and expression of the gene encoding cystatin D, a novel human cysteine proteinase inhibitor". J Biol Chem 266 (30): 20538–43. PMID 1939105.
2. "Entrez Gene: CST5 cystatin D".

External links

• The MEROPS online database for peptidases and their inhibitors: I25.005

Further reading

• Brown WM, Dziegielewska KM (1997). "Friends and relations of the cystatin superfamily--new members and their evolution". Protein Sci. 6 (1): 5–12. doi:10.1002/pro.5560060102. PMC 2143511. PMID 9007972.
• Saitoh E, Isemura S, Sanada K; et al. (1989). "Cystatin superfamily. Evidence that family II cystatin genes are evolutionarily related to family III cystatin genes". Biol. Chem. Hoppe-Seyler. 369 Suppl: 191–7. PMID 3202964.
• Dickinson DP, Thiesse M, Dempsey LD, Millar SJ (1993). "Genomic cloning, physical mapping, and expression of human type 2 cystatin genes". Crit. Rev. Oral Biol. Med. 4 (3–4): 573–80. PMID 7690606.
• Dickinson DP, Zhao Y, Thiesse M, Siciliano MJ (1995). "Direct mapping of seven genes encoding human type 2 cystatins to a single site located at 20p11.2". Genomics 24 (1): 172–5. doi:10.1006/geno.1994.1595. PMID 7896273.
• Balbín M, Hall A, Grubb A; et al. (1994). "Structural and functional characterization of two allelic variants of human cystatin D sharing a characteristic inhibition spectrum against mammalian cysteine proteinases". J. Biol. Chem. 269 (37): 23156–62. PMID 8083219.
• Thiesse M, Millar SJ, Dickinson DP (1994). "The human type 2 cystatin gene family consists of eight to nine members, with at least seven genes clustered at a single locus on human chromosome 20". DNA Cell Biol. 13 (2): 97–116. doi:10.1089/dna.1994.13.97. PMID 8179826.
• Freije JP, Balbín M, Abrahamson M; et al. (1993). "Human cystatin D. cDNA cloning, characterization of the Escherichia coli expressed inhibitor, and identification of the native protein in saliva". J. Biol. Chem. 268 (21): 15737–44. PMID 8340398.
• Freije JP, Pendás AM, Velasco G; et al. (1993). "Localization of the human cystatin D gene (CST5) to chromosome 20p11.21 by in situ hybridization". Cytogenet. Cell Genet. 62 (1): 29–31. doi:10.1159/000133438. PMID 8422752.
• Balbín M, Freije JP, Abrahamson M; et al. (1993). "A sequence variation in the human cystatin D gene resulting in an amino acid (Cys/Arg) polymorphism at the protein level". Hum. Genet. 90 (6): 668–9. doi:10.1007/BF00202491. PMID 8444475.
• Deloukas P, Matthews LH, Ashurst J; et al. (2002). "The DNA sequence and comparative analysis of human chromosome 20". Nature 414 (6866): 865–71. doi:10.1038/414865a. PMID 11780052.
• Dickinson DP, Thiesse M, Hicks MJ (2002). "Expression of type 2 cystatin genes CST1-CST5 in adult human tissues and the developing submandibular gland". DNA Cell Biol. 21 (1): 47–65. doi:10.1089/10445490252810311. PMID 11879580.
• Strausberg RL, Feingold EA, Grouse LH; et al. (2003). "Generation and initial analysis of more than 15,000 full-length human and mouse cDNA sequences". Proc. Natl. Acad. Sci. U.S.A. 99 (26): 16899–903. doi:10.1073/pnas.242603899. PMC 139241. PMID 12477932.
• Gerhard DS, Wagner L, Feingold EA; et al. (2004). "The Status, Quality, and Expansion of the NIH Full-Length cDNA Project: The Mammalian Gene Collection (MGC)". Genome Res. 14 (10B): 2121–7. doi:10.1101/gr.2596504. PMC 528928. PMID 15489334.
• Alvarez-Fernandez M, Liang YH, Abrahamson M, Su XD (2005). "Crystal structure of human cystatin D, a cysteine peptidase inhibitor with restricted inhibition profile". J. Biol. Chem. 280 (18): 18221–8. doi:10.1074/jbc.M411914200. PMID 15728581.