SERPINB1

SERPINB1
Available structures PDB Ortholog search: PDBe RCSB List of PDB id codes 4GA7
Identifiers
Aliases	SERPINB1, EI, ELANH2, HEL57, LEI, M/NEI, MNEI, PI-2, PI2, HEL-S-27, serpin family B member 1
External IDs	OMIM: 130135 MGI: 1913472 HomoloGene: 133768 GeneCards: SERPINB1
Gene location (Human) Chr. Chromosome 6 (human) Band 6p25.2 Start 2,832,332 bp End 2,841,959 bp
Gene location (Mouse) Chr. Chromosome 13 (mouse) Band 13 A3.2|13 13.75 cM Start 33,026,075 bp End 33,035,168 bp
RNA expression pattern Bgee Human Mouse (ortholog) Top expressed in oral cavity bone marrow monocyte palpebral conjunctiva body of pancreas jejunal mucosa spongy bone bone marrow cells duodenum blood Top expressed in left colon jejunum duodenum mucous cell of stomach esophagus epithelium of stomach ileum Paneth cell crypt of lieberkuhn of small intestine pyloric antrum More reference expression data BioGPS More reference expression data
Gene ontology Molecular function peptidase inhibitor activity serine-type endopeptidase inhibitor activity protein binding Cellular component cytoplasm extracellular exosome membrane extracellular space secretory granule lumen extracellular matrix extracellular region collagen-containing extracellular matrix Biological process negative regulation of peptidase activity negative regulation of endopeptidase activity neutrophil degranulation type B pancreatic cell proliferation Sources:Amigo / QuickGO
Orthologs Species Human Mouse Entrez 1992 66222 Ensembl ENSG00000021355 ENSMUSG00000044734 UniProt P30740 Q9D154 RefSeq (mRNA) NM_030666 NM_025429 RefSeq (protein) NP_109591 NP_079705 Location (UCSC) Chr 6: 2.83 – 2.84 Mb Chr 13: 33.03 – 33.04 Mb PubMed search
Wikidata
View/Edit Human View/Edit Mouse

Leukocyte elastase inhibitor (LEI) also known as serpin B1 is a protein that in humans is encoded by the SERPINB1 gene. It is a member of the clade B serpins or ov-serpins (ovalbumin related serpins) founded by ovalbumin.

MNEI (monocyte/neutrophil elastase inhibitor) is the mouse orthologue of human SerpinB1.

Function

SerpinB1 is a cytoplasmic serine protease inhibitor of polymorphonuclear neutrophils. Among other serine proteases, it specifically inhibits neutrophil elastase, PR3 and cathepsin G, all found in neutrophil granules, by a suicide inhibition mechanism. SerpinB1 was found to reduce tissue damage caused by the mentioned proteases during inflammation and has a role in neutrophil homeostasis in mice. In various infection models (e.g. pneumonia) correlation of SerpinB1 absence and lack of microbial clearance have been shown. Different knockout strains serve as model to investigate the role of SerpinB1 in vivo.

See also

• Serpin

Further reading

• Rasmussen HH, van Damme J, Puype M, et al. (1993). "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. PMID 1286667. S2CID 41855774.
• Packard BZ, Lee SS, Remold-O'Donnell E, Komoriya A (1995). "A serpin from human tumor cells with direct lymphoid immunomodulatory activity: mitogenic stimulation of human tumor-infiltrating lymphocytes". Biochim. Biophys. Acta. 1269 (1): 41–50. doi:10.1016/0167-4889(95)00113-7. PMID 7578269.
• Sugimori T, Cooley J, Hoidal JR, Remold-O'Donnell E (1995). "Inhibitory properties of recombinant human monocyte/neutrophil elastase inhibitor". Am. J. Respir. Cell Mol. Biol. 13 (3): 314–22. doi:10.1165/ajrcmb.13.3.7654387. PMID 7654387.
• Maruyama K, Sugano S (1994). "Oligo-capping: a simple method to replace the cap structure of eukaryotic mRNAs with oligoribonucleotides". Gene. 138 (1–2): 171–4. doi:10.1016/0378-1119(94)90802-8. PMID 8125298.
• Evans E, Cooley J, Remold-O'Donnell E (1996). "Characterization and chromosomal localization of ELANH2, the gene encoding human monocyte/neutrophil elastase inhibitor". Genomics. 28 (2): 235–40. doi:10.1006/geno.1995.1136. PMID 8530031.
• Suzuki Y, Yoshitomo-Nakagawa K, Maruyama K, et al. (1997). "Construction and characterization of a full length-enriched and a 5'-end-enriched cDNA library". Gene. 200 (1–2): 149–56. doi:10.1016/S0378-1119(97)00411-3. PMID 9373149.
• Zeng W, Silverman GA, Remold-O'Donnell E (1998). "Structure and sequence of human M/NEI (monocyte/neutrophil elastase inhibitor), an Ov-serpin family gene". Gene. 213 (1–2): 179–87. doi:10.1016/S0378-1119(98)00189-9. PMID 9630619.
• Sun J, Stephens R, Mirza G, et al. (1999). "A serpin gene cluster on human chromosome 6p25 contains PI6, PI9 and ELANH2 which have a common structure almost identical to the 18q21 ovalbumin serpin genes". Cytogenet. Cell Genet. 82 (3–4): 273–7. doi:10.1159/000015118. PMID 9858835. S2CID 23659776.
• Perani P, Zeggai S, Torriglia A, Courtois Y (2000). "Mutations on the hinge region of leukocyte elastase inhibitor determine the loss of inhibitory function". Biochem. Biophys. Res. Commun. 274 (3): 841–4. doi:10.1006/bbrc.2000.3191. PMID 10924364.
• Cooley J, Takayama TK, Shapiro SD, et al. (2002). "The serpin MNEI inhibits elastase-like and chymotrypsin-like serine proteases through efficient reactions at two active sites". Biochemistry. 40 (51): 15762–70. doi:10.1021/bi0113925. PMID 11747453.
• Korkmaz B, Attucci S, Hazouard E, et al. (2002). "Discriminating between the activities of human neutrophil elastase and proteinase 3 using serpin-derived fluorogenic substrates". J. Biol. Chem. 277 (42): 39074–81. doi:10.1074/jbc.M202918200. PMID 12114510.
• Benarafa C, Cooley J, Zeng W, et al. (2003). "Characterization of four murine homologs of the human ov-serpin monocyte neutrophil elastase inhibitor MNEI (SERPINB1)". J. Biol. Chem. 277 (44): 42028–33. doi:10.1074/jbc.M207080200. PMID 12189154.
• 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. Bibcode:2002PNAS...9916899M. doi:10.1073/pnas.242603899. PMC 139241. PMID 12477932.
• Gevaert K, Goethals M, Martens L, et al. (2004). "Exploring proteomes and analyzing protein processing by mass spectrometric identification of sorted N-terminal peptides". Nat. Biotechnol. 21 (5): 566–9. doi:10.1038/nbt810. PMID 12665801. S2CID 23783563.
• Mungall AJ, Palmer SA, Sims SK, et al. (2003). "The DNA sequence and analysis of human chromosome 6". Nature. 425 (6960): 805–11. Bibcode:2003Natur.425..805M. doi:10.1038/nature02055. PMID 14574404.
• 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.
• Ahmed M, Forsberg J, Bergsten P (2005). "Protein profiling of human pancreatic islets by two-dimensional gel electrophoresis and mass spectrometry". J. Proteome Res. 4 (3): 931–40. doi:10.1021/pr050024a. PMID 15952740.

External links

• The MEROPS online database for peptidases and their inhibitors: I04.006
• SERPINB1+protein,+human at the U.S. National Library of Medicine Medical Subject Headings (MeSH)

This article incorporates text from the United States National Library of Medicine, which is in the public domain.