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SERPINB1 serpin family B member 1 [ Homo sapiens (human) ]

Gene ID: 1992, updated on 11-Jun-2025
Official Symbol
SERPINB1provided by HGNC
Official Full Name
serpin family B member 1provided by HGNC
Primary source
HGNC:HGNC:3311
See related
Ensembl:ENSG00000021355 MIM:130135; AllianceGenome:HGNC:3311
Gene type
protein coding
RefSeq status
REVIEWED
Organism
Homo sapiens
Lineage
Eukaryota; Metazoa; Chordata; Craniata; Vertebrata; Euteleostomi; Mammalia; Eutheria; Euarchontoglires; Primates; Haplorrhini; Catarrhini; Hominidae; Homo
Also known as
EI; LEI; PI2; MNEI; PI-2; HEL57; M/NEI; ELANH2; HEL-S-27
Summary
The protein encoded by this gene is a member of the serpin family of proteinase inhibitors. Members of this family maintain homeostasis by neutralizing overexpressed proteinase activity through their function as suicide substrates. This protein inhibits the neutrophil-derived proteinases neutrophil elastase, cathepsin G, and proteinase-3 and thus protects tissues from damage at inflammatory sites. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Aug 2012]
Expression
Broad expression in esophagus (RPKM 214.3), bone marrow (RPKM 155.6) and 15 other tissues See more
Orthologs
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See SERPINB1 in Genome Data Viewer
Location:
6p25.2
Exon count:
9
Annotation release Status Assembly Chr Location
RS_2024_08 current GRCh38.p14 (GCF_000001405.40) 6 NC_000006.12 (2832332..2841863, complement)
RS_2024_08 current T2T-CHM13v2.0 (GCF_009914755.1) 6 NC_060930.1 (2698484..2708154, complement)
RS_2024_09 previous assembly GRCh37.p13 (GCF_000001405.25) 6 NC_000006.11 (2832566..2842097, complement)

Chromosome 6 - NC_000006.12Genomic Context describing neighboring genes Neighboring gene myosin light chain kinase family member 4 Neighboring gene ATAC-STARR-seq lymphoblastoid silent region 16830 Neighboring gene ATAC-STARR-seq lymphoblastoid silent region 16831 Neighboring gene WRN helicase interacting protein 1 Neighboring gene uncharacterized LOC124901241 Neighboring gene Sharpr-MPRA regulatory region 6984 Neighboring gene ReSE screen-validated silencer GRCh37_chr6:2798034-2798138 Neighboring gene H3K4me1 hESC enhancer GRCh37_chr6:2802330-2802830 Neighboring gene P300/CBP strongly-dependent group 1 enhancer GRCh37_chr6:2809907-2811106 Neighboring gene ATAC-STARR-seq lymphoblastoid silent region 16832 Neighboring gene Sharpr-MPRA regulatory region 12426 Neighboring gene ATAC-STARR-seq lymphoblastoid active region 23873 Neighboring gene nonconserved acetylation island sequence 71 enhancer Neighboring gene ATAC-STARR-seq lymphoblastoid active region 23874 Neighboring gene ATAC-STARR-seq lymphoblastoid active region 23875 Neighboring gene ATAC-STARR-seq lymphoblastoid active region 23876 Neighboring gene serpin family B member 9 pseudogene 1 Neighboring gene ATAC-STARR-seq lymphoblastoid active region 23877 Neighboring gene ATAC-STARR-seq lymphoblastoid active region 23878 Neighboring gene ATAC-STARR-seq lymphoblastoid active region 23879 Neighboring gene microRNA 4645 Neighboring gene H3K27ac-H3K4me1 hESC enhancer GRCh37_chr6:2869952-2870526 Neighboring gene H3K27ac-H3K4me1 hESC enhancer GRCh37_chr6:2875298-2876239

  • Project title: Tissue-specific circular RNA induction during human fetal development
  • Description: 35 human fetal samples from 6 tissues (3 - 7 replicates per tissue) collected between 10 and 20 weeks gestational time were sequenced using Illumina TruSeq Stranded Total RNA
  • BioProject: PRJNA270632
  • Publication: PMID 26076956
  • Analysis date: Mon Apr 2 22:54:59 2018

GeneRIFs: Gene References Into Functions

What's a GeneRIF?
Products Interactant Other Gene Complex Source Pubs Description

Markers

Gene Ontology Provided by GOA

Function Evidence Code Pubs
enables peptidase inhibitor activity IDA
Inferred from Direct Assay
more info
PubMed 
enables peptidase inhibitor activity IEA
Inferred from Electronic Annotation
more info
 
enables protein binding IPI
Inferred from Physical Interaction
more info
PubMed 
enables serine-type endopeptidase inhibitor activity IBA
Inferred from Biological aspect of Ancestor
more info
 
enables serine-type endopeptidase inhibitor activity IEA
Inferred from Electronic Annotation
more info
 
enables serine-type endopeptidase inhibitor activity IMP
Inferred from Mutant Phenotype
more info
PubMed 
enables serine-type endopeptidase inhibitor activity NAS
Non-traceable Author Statement
more info
PubMed 
Component Evidence Code Pubs
located_in cytolytic granule IEA
Inferred from Electronic Annotation
more info
 
located_in cytoplasm IEA
Inferred from Electronic Annotation
more info
 
located_in cytoplasmic ribonucleoprotein granule IDA
Inferred from Direct Assay
more info
 
located_in early endosome IEA
Inferred from Electronic Annotation
more info
 
located_in endosome IEA
Inferred from Electronic Annotation
more info
 
located_in extracellular exosome HDA PubMed 
located_in extracellular matrix HDA PubMed 
located_in extracellular region HDA PubMed 
located_in extracellular region IDA
Inferred from Direct Assay
more info
PubMed 
located_in extracellular region IEA
Inferred from Electronic Annotation
more info
 
located_in extracellular region TAS
Traceable Author Statement
more info
 
located_in extracellular space HDA PubMed 
is_active_in extracellular space IBA
Inferred from Biological aspect of Ancestor
more info
 
located_in extracellular space IEA
Inferred from Electronic Annotation
more info
 
located_in lysosome IEA
Inferred from Electronic Annotation
more info
 
located_in membrane HDA PubMed 
located_in secretory granule lumen TAS
Traceable Author Statement
more info
 
Preferred Names
leukocyte elastase inhibitor
Names
epididymis luminal protein 57
epididymis secretory protein Li 27
peptidase inhibitor 2
protease inhibitor 2 (anti-elastase), monocyte/neutrophil derived
serine (or cysteine) proteinase inhibitor, clade B (ovalbumin), member 1
serpin peptidase inhibitor, clade B (ovalbumin), member 1

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RefSeqs maintained independently of Annotated Genomes

These reference sequences exist independently of genome builds. Explain

These reference sequences are curated independently of the genome annotation cycle, so their versions may not match the RefSeq versions in the current genome build. Identify version mismatches by comparing the version of the RefSeq in this section to the one reported in Genomic regions, transcripts, and products above.

mRNA and Protein(s)

  1. NM_030666.4NP_109591.1  leukocyte elastase inhibitor

    See identical proteins and their annotated locations for NP_109591.1

    Status: REVIEWED

    Description
    Transcript Variant: This variant (1) encodes the functional protein.
    Source sequence(s)
    AK309765, AW451326, BC009015, BM785367, BM823453
    Consensus CDS
    CCDS4477.1
    UniProtKB/Swiss-Prot
    A8K5L2, B4DNT0, P30740, Q53FB9, Q5W0E1, Q9UDF8
    UniProtKB/TrEMBL
    B4E3A8, V9HWH1
    Related
    ENSP00000370115.5, ENST00000380739.6
    Conserved Domains (1) summary
    cl00137
    Location:4379
    SERPIN; SERine Proteinase INhibitors (serpins) exhibit conformational polymorphism shifting from native to cleaved, latent, delta, or polymorphic forms. Many serpins, such as antitrypsin and antichymotrypsin, function as serine protease inhibitors which regulate ...

RNA

  1. NR_073111.2 RNA Sequence

    Status: REVIEWED

    Description
    Transcript Variant: This variant (2) uses an alternate internal exon compared to variant 1. This variant is represented as non-coding because the use of the 5'-most expected translational start codon, as used in variant 1, renders the transcript a candidate for nonsense-mediated mRNA decay (NMD).
    Source sequence(s)
    AK298044, AK309765, AW451326, BM785367, BM823453
  2. NR_073112.2 RNA Sequence

    Status: REVIEWED

    Description
    Transcript Variant: This variant (3) uses an alternate splice site in an internal exon compared to variant 1. This variant is represented as non-coding because the use of the 5'-most expected translational start codon, as used in variant 1, renders the transcript a candidate for nonsense-mediated mRNA decay (NMD).
    Source sequence(s)
    AK309765, AW451326, BC009015, BI521531, BM785367, BM823453, BU942473

RefSeqs of Annotated Genomes: GCF_000001405.40-RS_2024_08

The following sections contain reference sequences that belong to a specific genome build. Explain

Reference GRCh38.p14 Primary Assembly

Genomic

  1. NC_000006.12 Reference GRCh38.p14 Primary Assembly

    Range
    2832332..2841863 complement
    Download
    GenBank, FASTA, Sequence Viewer (Graphics)

mRNA and Protein(s)

  1. XM_011514335.3XP_011512637.1  leukocyte elastase inhibitor isoform X2

    UniProtKB/TrEMBL
    B4E3A8
    Conserved Domains (1) summary
    cl00137
    Location:7330
    SERPIN; SERine Proteinase INhibitors (serpins) exhibit conformational polymorphism shifting from native to cleaved, latent, delta, or polymorphic forms. Many serpins, such as antitrypsin and antichymotrypsin, function as serine protease inhibitors which regulate ...
  2. XM_011514333.2XP_011512635.1  leukocyte elastase inhibitor isoform X1

    See identical proteins and their annotated locations for XP_011512635.1

    UniProtKB/Swiss-Prot
    A8K5L2, B4DNT0, P30740, Q53FB9, Q5W0E1, Q9UDF8
    UniProtKB/TrEMBL
    B4E3A8, V9HWH1
    Conserved Domains (1) summary
    cl00137
    Location:4379
    SERPIN; SERine Proteinase INhibitors (serpins) exhibit conformational polymorphism shifting from native to cleaved, latent, delta, or polymorphic forms. Many serpins, such as antitrypsin and antichymotrypsin, function as serine protease inhibitors which regulate ...
  3. XM_047418269.1XP_047274225.1  leukocyte elastase inhibitor isoform X2

    UniProtKB/TrEMBL
    B4E3A8
  4. XM_011514334.3XP_011512636.1  leukocyte elastase inhibitor isoform X1

    See identical proteins and their annotated locations for XP_011512636.1

    UniProtKB/Swiss-Prot
    A8K5L2, B4DNT0, P30740, Q53FB9, Q5W0E1, Q9UDF8
    UniProtKB/TrEMBL
    B4E3A8, V9HWH1
    Conserved Domains (1) summary
    cl00137
    Location:4379
    SERPIN; SERine Proteinase INhibitors (serpins) exhibit conformational polymorphism shifting from native to cleaved, latent, delta, or polymorphic forms. Many serpins, such as antitrypsin and antichymotrypsin, function as serine protease inhibitors which regulate ...

Alternate T2T-CHM13v2.0

Genomic

  1. NC_060930.1 Alternate T2T-CHM13v2.0

    Range
    2698484..2708154 complement
    Download
    GenBank, FASTA, Sequence Viewer (Graphics)

mRNA and Protein(s)

  1. XM_054354430.1XP_054210405.1  leukocyte elastase inhibitor isoform X1

    UniProtKB/Swiss-Prot
    A8K5L2, B4DNT0, P30740, Q53FB9, Q5W0E1, Q9UDF8
    UniProtKB/TrEMBL
    B4E3A8, V9HWH1
  2. XM_054354432.1XP_054210407.1  leukocyte elastase inhibitor isoform X2

    UniProtKB/TrEMBL
    B4E3A8
  3. XM_054354429.1XP_054210404.1  leukocyte elastase inhibitor isoform X1

    UniProtKB/Swiss-Prot
    A8K5L2, B4DNT0, P30740, Q53FB9, Q5W0E1, Q9UDF8
    UniProtKB/TrEMBL
    B4E3A8, V9HWH1
  4. XM_054354431.1XP_054210406.1  leukocyte elastase inhibitor isoform X2

    UniProtKB/TrEMBL
    B4E3A8