S100 calcium-binding protein A7 (S100A7), also known as psoriasin, is a protein that in humans is encoded by the S100A7gene.[3]
Function
S100A7 is a member of the S100 family of proteins containing 2 EF-hand calcium-binding motifs. S100 proteins are localized in the cytoplasm and/or nucleus of a wide range of cells, and involved in the regulation of a number of cellular processes such as cell cycle progression and differentiation. S100 genes include at least 13 members which are located as a cluster on chromosome 1q21. This protein differs from the other S100 proteins of known structure in its lack of calcium binding ability in one EF-hand at the N-terminus. The protein functions as a prominent antimicrobial peptide mainly against E. coli.[4]
S100A7 also displays antimicrobial properties. It is secreted by epithelial cells of the skin and is a key antimicrobial protein against Escherichia coli by disrupting their cell membranes. This is the reason that in countries with poor sanitation, human skin is exposed to E. coli strains from faecal matter but it does not usually result in an infection.[5]
S100A7 is highly homologous to S100A7A (koebnerisin) but distinct in expression, tissue distribution and function.[6][7][8][9]
Clinical significance
This protein is markedly over-expressed in the skin lesions of psoriatic patients, but is excluded as a candidate gene for familial psoriasis susceptibility.[4] The expression of psoriasin is induced in skin wounds[10] through activation of the epidermal growth factor receptor.
^"Human PubMed Reference:". National Center for Biotechnology Information, U.S. National Library of Medicine.
^Madsen P, Rasmussen HH, Leffers H, Honoré B, Dejgaard K, Olsen E, Kiil J, Walbum E, Andersen AH, Basse B (Nov 1991). "Molecular cloning, occurrence, and expression of a novel partially secreted protein "psoriasin" that is highly up-regulated in psoriatic skin". J. Invest. Dermatol. 97 (4): 701–12. doi:10.1111/1523-1747.ep12484041. PMID1940442.
^Zwicker S, Bureik D, Ruzicka T, Wolf R (March 2012). "[Friend or Foe?--Psoriasin and Koebnerisin: multifunctional defence molecules in skin differentiation, tumorigenesis and inflammation]". Dtsch. Med. Wochenschr. (in German). 137 (10): 491–4. doi:10.1055/s-0031-1299015. PMID22374659. S2CID196460709.
^Emberley ED, Niu Y, Leygue E, Tomes L, Gietz RD, Murphy LC, Watson PH (April 2003). "Psoriasin interacts with Jab1 and influences breast cancer progression". Cancer Res. 63 (8): 1954–61. PMID12702588.
^Hagens G, Roulin K, Hotz R, Saurat JH, Hellman U, Siegenthaler G (February 1999). "Probable interaction between S100A7 and E-FABP in the cytosol of human keratinocytes from psoriatic scales". Mol. Cell. Biochem. 192 (1–2): 123–8. doi:10.1023/A:1006894909694. PMID10331666. S2CID24171894.
^Winston J, Wolf R (September 2012). "Psoriasin (S100A7) promotes migration of a squamous carcinoma cell line". J. Dermatol. Sci. 67 (3): 205–7. doi:10.1016/j.jdermsci.2012.06.009. PMID22795619.
Further reading
Schäfer BW, Heizmann CW (1996). "The S100 family of EF-hand calcium-binding proteins: functions and pathology". Trends Biochem. Sci. 21 (4): 134–40. doi:10.1016/S0968-0004(96)80167-8. PMID8701470.
Rasmussen HH, van Damme J, Puype M, Gesser B, Celis JE, Vandekerckhove J (1992). "Microsequences of 145 proteins recorded in the two-dimensional gel protein database of normal human epidermal keratinocytes". Electrophoresis. 13 (12): 960–9. doi:10.1002/elps.11501301199. PMID1286667. S2CID41855774.
Schäfer BW, Wicki R, Engelkamp D, Mattei MG, Heizmann CW (1995). "Isolation of a YAC clone covering a cluster of nine S100 genes on human chromosome 1q21: rationale for a new nomenclature of the S100 calcium-binding protein family". Genomics. 25 (3): 638–43. doi:10.1016/0888-7543(95)80005-7. PMID7759097.
Bürgisser DM, Siegenthaler G, Kuster T, Hellman U, Hunziker P, Birchler N, Heizmann CW (1995). "Amino acid sequence analysis of human S100A7 (psoriasin) by tandem mass spectrometry". Biochem. Biophys. Res. Commun. 217 (1): 257–63. doi:10.1006/bbrc.1995.2772. PMID8526920.
Celis JE, Rasmussen HH, Vorum H, Madsen P, Honoré B, Wolf H, Orntoft TF (1996). "Bladder squamous cell carcinomas express psoriasin and externalize it to the urine". J. Urol. 155 (6): 2105–12. doi:10.1016/S0022-5347(01)66118-4. PMID8618345.
Brodersen DE, Nyborg J, Kjeldgaard M (1999). "Zinc-binding site of an S100 protein revealed. Two crystal structures of Ca2+-bound human psoriasin (S100A7) in the Zn2+-loaded and Zn2+-free states". Biochemistry. 38 (6): 1695–704. doi:10.1021/bi982483d. PMID10026247.
Semprini S, Capon F, Bovolenta S, Bruscia E, Pizzuti A, Fabrizi G, Schietroma C, Zambruno G, Dallapiccola B, Novelli G (1999). "Genomic structure, promoter characterisation and mutational analysis of the S100A7 gene: exclusion of a candidate for familial psoriasis susceptibility". Hum. Genet. 104 (2): 130–4. doi:10.1007/s004390050925. PMID10190323. S2CID23016366.
Hagens G, Roulin K, Hotz R, Saurat JH, Hellman U, Siegenthaler G (1999). "Probable interaction between S100A7 and E-FABP in the cytosol of human keratinocytes from psoriatic scales". Mol. Cell. Biochem. 192 (1–2): 123–8. doi:10.1023/A:1006894909694. PMID10331666. S2CID24171894.
Ruse M, Lambert A, Robinson N, Ryan D, Shon KJ, Eckert RL (2001). "S100A7, S100A10, and S100A11 are transglutaminase substrates". Biochemistry. 40 (10): 3167–73. doi:10.1021/bi0019747. PMID11258932.
Enerbäck C, Porter DA, Seth P, Sgroi D, Gaudet J, Weremowicz S, Morton CC, Schnitt S, Pitts RL, Stampl J, Barnhart K, Polyak K (2002). "Psoriasin expression in mammary epithelial cells in vitro and in vivo". Cancer Res. 62 (1): 43–7. PMID11782356.