CRYBA4 Back

crystallin, beta A4

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NCBI Description of CRYBA4

Crystallins are separated into two classes: taxon-specific, or enzyme, and ubiquitous. The latter class constitutes the major proteins of vertebrate eye lens and maintains the transparency and refractive index of the lens. Since lens central fiber cells lose their nuclei during development, these crystallins are made and then retained throughout life, making them extremely stable proteins. Mammalian lens crystallins are divided into alpha, beta, and gamma families; beta and gamma crystallins are also considered as a superfamily. Alpha and beta families are further divided into acidic and basic groups. Seven protein regions exist in crystallins: four homologous motifs, a connecting peptide, and N- and C-terminal extensions. Beta-crystallins, the most heterogeneous, differ by the presence of the C-terminal extension (present in the basic group, none in the acidic group). Beta-crystallins form aggregates of different sizes and are able to self-associate to form dimers or to form heterodimers with other beta-crystallins. This gene, a beta acidic group member, is part of a gene cluster with beta-B1, beta-B2, and beta-B3. Sequence Note: Experimental evidence for the bovine betaA4-crystallin in PMID: 1874445 suggests that a possible translation start codon would exist at nt 3-5 in this human sequence. No experimental evidence currently exists for a longer protein being produced in human cells.

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Figure notes


• "Mouse over" a mutation to see details.
• Missense green saturation indicates evolutionary conservation of the mutated positions.
• Red hashes in protein strip are splice sites.
• Blue-white-red bars are log2 copy ratio distributions (–1 to +1) from Zack et al. (2013).


Legend

CRYBA4 is highly significantly mutated in
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CRYBA4 is significantly mutated in
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CRYBA4 is near significance in
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Click on a tumor type to see its full list of significant genes.

Data details


Mutation list for CRYBA4