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LAMB2 laminin subunit beta 2 [ Homo sapiens (human) ]

Gene ID: 3913, updated on 1-Aug-2020

Summary

Official Symbol
LAMB2provided by HGNC
Official Full Name
laminin subunit beta 2provided by HGNC
Primary source
HGNC:HGNC:6487
See related
Ensembl:ENSG00000172037 MIM:150325
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
LAMS; NPHS5
Summary
Laminins, a family of extracellular matrix glycoproteins, are the major noncollagenous constituent of basement membranes. They have been implicated in a wide variety of biological processes including cell adhesion, differentiation, migration, signaling, neurite outgrowth and metastasis. Laminins, composed of 3 non identical chains: laminin alpha, beta and gamma (formerly A, B1, and B2, respectively), form a cruciform structure consisting of 3 short arms, each formed by a different chain, and a long arm composed of all 3 chains. Each laminin chain is a multidomain protein encoded by a distinct gene. Several isoforms of each chain have been described. Different alpha, beta and gamma chain isomers combine to give rise to different heterotrimeric laminin isoforms which are designated by Arabic numerals in the order of their discovery, i.e. alpha1beta1gamma1 heterotrimer is laminin 1. The biological functions of the different chains and trimer molecules are largely unknown, but some of the chains have been shown to differ with respect to their tissue distribution, presumably reflecting diverse functions in vivo. This gene encodes the beta chain isoform laminin, beta 2. The beta 2 chain contains the 7 structural domains typical of beta chains of laminin, including the short alpha region. However, unlike beta 1 chain, beta 2 has a more restricted tissue distribution. It is enriched in the basement membrane of muscles at the neuromuscular junctions, kidney glomerulus and vascular smooth muscle. Transgenic mice in which the beta 2 chain gene was inactivated by homologous recombination, showed defects in the maturation of neuromuscular junctions and impairment of glomerular filtration. Alternative splicing involving a non consensus 5' splice site (gc) in the 5' UTR of this gene has been reported. It was suggested that inefficient splicing of this first intron, which does not change the protein sequence, results in a greater abundance of the unspliced form of the transcript than the spliced form. The full-length nature of the spliced transcript is not known. [provided by RefSeq, Aug 2011]
Expression
Ubiquitous expression in heart (RPKM 75.8), placenta (RPKM 62.9) and 24 other tissues See more
Orthologs

Genomic context

See LAMB2 in Genome Data Viewer
Location:
3p21.31
Exon count:
33
Annotation release Status Assembly Chr Location
109.20200522 current GRCh38.p13 (GCF_000001405.39) 3 NC_000003.12 (49121114..49133066, complement)
105 previous assembly GRCh37.p13 (GCF_000001405.25) 3 NC_000003.11 (49158547..49170599, complement)

Chromosome 3 - NC_000003.12Genomic Context describing neighboring genes Neighboring gene glutaminyl-tRNA synthetase 1 Neighboring gene microRNA 6890 Neighboring gene ubiquitin specific peptidase 19 Neighboring gene CRISPRi-validated cis-regulatory element chr3.2093 Neighboring gene laminin subunit beta 2 pseudogene 1

Genomic regions, transcripts, and products

Expression

  • Project title: HPA RNA-seq normal tissues
  • Description: RNA-seq was performed of tissue samples from 95 human individuals representing 27 different tissues in order to determine tissue-specificity of all protein-coding genes
  • BioProject: PRJEB4337
  • Publication: PMID 24309898
  • Analysis date: Wed Apr 4 07:08:55 2018

Bibliography

GeneRIFs: Gene References Into Functions

What's a GeneRIF?

HIV-1 interactions

Protein interactions

Protein Gene Interaction Pubs
Tat tat Treatment with cannabinoids inhibits HIV-1 Tat-enhanced attachment of U937 cells to collagen IV, laminin, or ECM1 proteins, which is linked to the cannabinoid receptor type 2 and the modulation of beta1-integrin and actin distribution PubMed
tat HIV-1 Tat enhances adhesion of human U937 monocyte-like cells to proteins of the extracellular matrix, such as collagen IV, laminin, and ECM1 PubMed
tat HIV-1 Tat upregulates the expression of extracellular matrix proteins, including the major basement membrane protein laminin PubMed

Go to the HIV-1, Human Interaction Database

Pathways from PubChem

Interactions

Products Interactant Other Gene Complex Source Pubs Description

General gene information

Markers

Homology

Gene Ontology Provided by GOA

Function Evidence Code Pubs
extracellular matrix structural constituent IBA
Inferred from Biological aspect of Ancestor
more info
PubMed 
extracellular matrix structural constituent ISS
Inferred from Sequence or Structural Similarity
more info
 
extracellular matrix structural constituent RCA
inferred from Reviewed Computational Analysis
more info
PubMed 
integrin binding IBA
Inferred from Biological aspect of Ancestor
more info
PubMed 
protein binding IPI
Inferred from Physical Interaction
more info
PubMed 
structural molecule activity NAS
Non-traceable Author Statement
more info
PubMed 
Process Evidence Code Pubs
Schwann cell development IEA
Inferred from Electronic Annotation
more info
 
animal organ morphogenesis IBA
Inferred from Biological aspect of Ancestor
more info
PubMed 
astrocyte development IEA
Inferred from Electronic Annotation
more info
 
axon extension involved in regeneration IEA
Inferred from Electronic Annotation
more info
 
axon guidance IEA
Inferred from Electronic Annotation
more info
 
basement membrane assembly IBA
Inferred from Biological aspect of Ancestor
more info
PubMed 
cell migration IBA
Inferred from Biological aspect of Ancestor
more info
PubMed 
cellular protein metabolic process TAS
Traceable Author Statement
more info
 
extracellular matrix organization TAS
Traceable Author Statement
more info
 
metanephric glomerular basement membrane development IEA
Inferred from Electronic Annotation
more info
 
metanephric glomerular visceral epithelial cell development IEA
Inferred from Electronic Annotation
more info
 
neuromuscular junction development IEA
Inferred from Electronic Annotation
more info
 
post-translational protein modification TAS
Traceable Author Statement
more info
 
retina development in camera-type eye IEA
Inferred from Electronic Annotation
more info
 
substrate adhesion-dependent cell spreading IBA
Inferred from Biological aspect of Ancestor
more info
PubMed 
tissue development IBA
Inferred from Biological aspect of Ancestor
more info
PubMed 
visual perception IEA
Inferred from Electronic Annotation
more info
 
Component Evidence Code Pubs
basement membrane IDA
Inferred from Direct Assay
more info
PubMed 
collagen-containing extracellular matrix HDA PubMed 
colocalizes_with collagen-containing extracellular matrix HDA PubMed 
colocalizes_with collagen-containing extracellular matrix ISS
Inferred from Sequence or Structural Similarity
more info
PubMed 
endoplasmic reticulum lumen TAS
Traceable Author Statement
more info
 
extracellular exosome HDA PubMed 
extracellular region TAS
Traceable Author Statement
more info
 
laminin complex IBA
Inferred from Biological aspect of Ancestor
more info
PubMed 
laminin-11 complex TAS
Traceable Author Statement
more info
PubMed 
laminin-3 complex IPI
Inferred from Physical Interaction
more info
PubMed 
neuromuscular junction IEA
Inferred from Electronic Annotation
more info
 
synaptic cleft IEA
Inferred from Electronic Annotation
more info
 

General protein information

Preferred Names
laminin subunit beta-2
Names
S-LAM beta
S-laminin subunit beta
laminin B1s chain
laminin S
laminin, beta 2 (laminin S)

NCBI Reference Sequences (RefSeq)

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.

Genomic

  1. NG_008094.1 RefSeqGene

    Range
    5117..17053
    Download
    GenBank, FASTA, Sequence Viewer (Graphics)

mRNA and Protein(s)

  1. NM_002292.4NP_002283.3  laminin subunit beta-2 precursor

    See identical proteins and their annotated locations for NP_002283.3

    Status: REVIEWED

    Source sequence(s)
    AC135506, BP354643, CN265778, CN265784, CV814167, S77512, X79683
    Consensus CDS
    CCDS2789.1
    UniProtKB/Swiss-Prot
    P55268
    UniProtKB/TrEMBL
    A0A024R319
    Related
    ENSP00000307156.4, ENST00000305544.9
    Conserved Domains (7) summary
    smart00283
    Location:14451701
    MA; Methyl-accepting chemotaxis-like domains (chemotaxis sensory transducer)
    cd00055
    Location:521562
    EGF_Lam; Laminin-type epidermal growth factor-like domain; laminins are the major noncollagenous components of basement membranes that mediate cell adhesion, growth migration, and differentiation; the laminin-type epidermal growth factor-like module occurs in ...
    pfam00053
    Location:783831
    Laminin_EGF; Laminin EGF domain
    pfam00055
    Location:57281
    Laminin_N; Laminin N-terminal (Domain VI)
    pfam16999
    Location:16481755
    V-ATPase_G_2; Vacuolar (H+)-ATPase G subunit
    cl15454
    Location:14831670
    HrpJ; HrpJ-like domain
    cl21478
    Location:14531541
    ATP-synt_B; ATP synthase B/B' CF(0)

RefSeqs of Annotated Genomes: Homo sapiens Annotation Release 109.20200522

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

Reference GRCh38.p13 Primary Assembly

Genomic

  1. NC_000003.12 Reference GRCh38.p13 Primary Assembly

    Range
    49121114..49133066 complement
    Download
    GenBank, FASTA, Sequence Viewer (Graphics)

mRNA and Protein(s)

  1. XM_005265127.4XP_005265184.1  laminin subunit beta-2 isoform X1

    See identical proteins and their annotated locations for XP_005265184.1

    UniProtKB/Swiss-Prot
    P55268
    UniProtKB/TrEMBL
    A0A024R319
    Related
    ENSP00000388325.1, ENST00000418109.5
    Conserved Domains (7) summary
    smart00283
    Location:14451701
    MA; Methyl-accepting chemotaxis-like domains (chemotaxis sensory transducer)
    cd00055
    Location:521562
    EGF_Lam; Laminin-type epidermal growth factor-like domain; laminins are the major noncollagenous components of basement membranes that mediate cell adhesion, growth migration, and differentiation; the laminin-type epidermal growth factor-like module occurs in ...
    pfam00053
    Location:783831
    Laminin_EGF; Laminin EGF domain
    pfam00055
    Location:57281
    Laminin_N; Laminin N-terminal (Domain VI)
    pfam16999
    Location:16481755
    V-ATPase_G_2; Vacuolar (H+)-ATPase G subunit
    cl15454
    Location:14831670
    HrpJ; HrpJ-like domain
    cl21478
    Location:14531541
    ATP-synt_B; ATP synthase B/B' CF(0)
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