Cystatin B

From Wikipedia, the free encyclopedia

Cystatin B (stefin B)

PDB rendering based on 1stf.

Available structures: 1stf, 2oct

Identifiers

Symbol(s)

CSTB; CST6; EPM1; PME; STFB

External IDs

OMIM: 601145 MGI: 109514 HomoloGene: 79

Gene ontology
Molecular Function:	• cysteine protease inhibitor activity
Cellular Component:	• intracellular • nucleus
Biological Process:	• adult locomotory behavior

RNA expression pattern

More reference expression data

Orthologs

Human

Mouse

Refseq

NM_000100 (mRNA)
NP_000091 (protein)

NM_007793 (mRNA)
NP_031819 (protein)

Location

Chr 21: 44.02 - 44.02 Mb

Chr 10: 77.83 - 77.83 Mb

Pubmed search

[1]

[2]

Cystatin B (stefin B), also known as CSTB, is a human gene.^[1]

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 kininogens. This gene encodes a stefin that functions as an intracellular thiol protease inhibitor. The protein is able to form a dimer stabilized by noncovalent forces, inhibiting papain and cathepsins l, h and b. The protein is thought to play a role in protecting against the proteases leaking from lysosomes. Evidence indicates that mutations in this gene are responsible for the primary defects in patients with progressive myoclonic epilepsy (EPM1).^[1]

[edit] References

^ ^a ^b Entrez Gene: CSTB cystatin B (stefin B).

[edit] Further reading

Turk V, Bode W (1991). "The cystatins: protein inhibitors of cysteine proteinases.". FEBS Lett. 285 (2): 213–9. PMID 1855589.
Järvinen M, Rinne A, Hopsu-Havu VK (1988). "Human cystatins in normal and diseased tissues--a review.". Acta Histochem. 82 (1): 5–18. PMID 3122506.
Brown WM, Dziegielewska KM (1997). "Friends and relations of the cystatin superfamily--new members and their evolution.". Protein Sci. 6 (1): 5–12. PMID 9007972.
Kos J, Lah TT (1998). "Cysteine proteinases and their endogenous inhibitors: target proteins for prognosis, diagnosis and therapy in cancer (review).". Oncol. Rep. 5 (6): 1349–61. PMID 9769367.
Stubbs MT, Laber B, Bode W, et al. (1990). "The refined 2.4 A X-ray crystal structure of recombinant human stefin B in complex with the cysteine proteinase papain: a novel type of proteinase inhibitor interaction.". EMBO J. 9 (6): 1939–47. PMID 2347312.
Jerala R, Trstenjak M, Lenarcic B, Turk V (1988). "Cloning a synthetic gene for human stefin B and its expression in E. coli.". FEBS Lett. 239 (1): 41–4. PMID 3053245.
Lenarcic B, Kos J, Dolenc I, et al. (1988). "Cathepsin D inactivates cysteine proteinase inhibitors, cystatins.". Biochem. Biophys. Res. Commun. 154 (2): 765–72. PMID 3261170.
Ritonja A, Machleidt W, Barrett AJ (1985). "Amino acid sequence of the intracellular cysteine proteinase inhibitor cystatin B from human liver.". Biochem. Biophys. Res. Commun. 131 (3): 1187–92. PMID 3902020.
Spiess E, Brüning A, Gack S, et al. (1994). "Cathepsin B activity in human lung tumor cell lines: ultrastructural localization, pH sensitivity, and inhibitor status at the cellular level.". J. Histochem. Cytochem. 42 (7): 917–29. PMID 8014475.
Lehesjoki AE, Koskiniemi M, Norio R, et al. (1993). "Localization of the EPM1 gene for progressive myoclonus epilepsy on chromosome 21: linkage disequilibrium allows high resolution mapping.". Hum. Mol. Genet. 2 (8): 1229–34. PMID 8104628.
Pennacchio LA, Lehesjoki AE, Stone NE, et al. (1996). "Mutations in the gene encoding cystatin B in progressive myoclonus epilepsy (EPM1)". Science 271 (5256): 1731–4. PMID 8596935.
Pennacchio LA, Myers RM (1997). "Isolation and characterization of the mouse cystatin B gene.". Genome Res. 6 (11): 1103–9. PMID 8938434.
Lalioti MD, Mirotsou M, Buresi C, et al. (1997). "Identification of mutations in cystatin B, the gene responsible for the Unverricht-Lundborg type of progressive myoclonus epilepsy (EPM1).". Am. J. Hum. Genet. 60 (2): 342–51. PMID 9012407.
Lafrenière RG, Rochefort DL, Chrétien N, et al. (1997). "Unstable insertion in the 5' flanking region of the cystatin B gene is the most common mutation in progressive myoclonus epilepsy type 1, EPM1.". Nat. Genet. 15 (3): 298–302. doi:10.1038/ng0397-298. PMID 9054946.
Virtaneva K, D'Amato E, Miao J, et al. (1997). "Unstable minisatellite expansion causing recessively inherited myoclonus epilepsy, EPM1.". Nat. Genet. 15 (4): 393–6. doi:10.1038/ng0497-393. PMID 9090386.
Bespalova IN, Adkins S, Pranzatelli M, Burmeister M (1997). "Novel cystatin B mutation and diagnostic PCR assay in an Unverricht-Lundborg progressive myoclonus epilepsy patient.". Am. J. Med. Genet. 74 (5): 467–71. PMID 9342192.