hg19 CCDS Gene
 

Consensus CDS Gene CCDS2789.1

GeneLAMB2
Descriptionlaminin subunit beta-2 precursor
SequencesCDS,  protein,  genomic
CCDS database CCDS2789.1

Associated Sequences

 mRNAProtein
UCSC Genesuc003cwe.3 
RefSeqNM_002292.3 NP_002283.3
XM_005265127.1 XP_005265184.1
VegaOTTHUMT00000345939 OTTHUMP00000210663
OTTHUMT00000345941 OTTHUMP00000210664
EnsemblENST00000305544 ENSP00000307156
ENST00000418109 ENSP00000388325
MGCBC172384 
BC144445 

Note: mRNA and protein sequences in other gene collections may differ from the CCDS sequences.


RefSeq summary of CCDS2789.1

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].


Data schema/format description and download

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Data last updated at UCSC: 2019-10-03

Description

This track shows human genome high-confidence gene annotations from the Consensus Coding Sequence (CCDS) project. This project is a collaborative effort to identify a core set of human protein-coding regions that are consistently annotated and of high quality. The long-term goal is to support convergence towards a standard set of gene annotations on the human genome.

Collaborators include:

For more information on the different gene tracks, see our Genes FAQ.

Methods

CDS annotations of the human genome were obtained from two sources: NCBI RefSeq and a union of the gene annotations from Ensembl and Vega, collectively known as Hinxton.

Genes with identical CDS genomic coordinates in both sets become CCDS candidates. The genes undergo a quality evaluation, which must be approved by all collaborators. The following criteria are currently used to assess each gene:

  • an initiating ATG (Exception: a non-ATG translation start codon is annotated if it has sufficient experimental support), a valid stop codon, and no in-frame stop codons (Exception: selenoproteins, which contain a TGA codon that is known to be translated to a selenocysteine instead of functioning as a stop codon)
  • ability to be translated from the genome reference sequence without frameshifts
  • recognizable splicing sites
  • no intersection with putative pseudogene predictions
  • supporting transcripts and protein homology
  • conservation evidence with other species

A unique CCDS ID is assigned to the CCDS, which links together all gene annotations with the same CDS. CCDS gene annotations are under continuous review, with periodic updates to this track.

Credits

This track was produced at UCSC from data downloaded from the CCDS project web site.

References

Hubbard T, Barker D, Birney E, Cameron G, Chen Y, Clark L, Cox T, Cuff J, Curwen V, Down T et al. The Ensembl genome database project. Nucleic Acids Res. 2002 Jan 1;30(1):38-41. PMID: 11752248; PMC: PMC99161

Pruitt KD, Harrow J, Harte RA, Wallin C, Diekhans M, Maglott DR, Searle S, Farrell CM, Loveland JE, Ruef BJ et al. The consensus coding sequence (CCDS) project: Identifying a common protein-coding gene set for the human and mouse genomes. Genome Res. 2009 Jul;19(7):1316-23. PMID: 19498102; PMC: PMC2704439

Pruitt KD, Tatusova T, Maglott DR. NCBI Reference Sequence (RefSeq): a curated non-redundant sequence database of genomes, transcripts and proteins. Nucleic Acids Res. 2005 Jan 1;33(Database issue):D501-4. PMID: 15608248; PMC: PMC539979