Entrez Summary: 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. The former class is also called phylogenetically-restricted crystallins. This gene encodes a taxon-specific crystallin protein which has NADPH-dependent quinone reductase activity distinct from other known quinone reductases. It lacks alcohol dehydrogenase activity although by similarity it is considered a member of the zinc-containing alcohol dehydrogenase family. Unlike other mammalian species, in humans, lens expression is low. Alternatively spliced transcript variants encoding different isoforms have been found for this gene. One pseudogene is known to exist. [provided by RefSeq, Sep 2008].
UniProt Summary: Does not have alcohol dehydrogenase activity. Binds NADP and acts through a one-electron transfer process. Orthoquinones, such as 1,2-naphthoquinone or 9,10-phenanthrenequinone, are the best substrates (in vitro). May act in the detoxification of xenobiotics. Interacts with (AU)-rich elements (ARE) in the 3'-UTR of target mRNA species. Enhances the stability of mRNA coding for BCL2. NADPH binding interferes with mRNA binding. {ECO:0000269|PubMed:17497241, ECO:0000269|PubMed:20103721}.
Pfam DomainsGO Terms
Pfam Domains
ADH N
ADH zinc N
GO Terms
NADPH:quinone reductase activity
NADH binding
xenobiotic catabolic process
NADPH binding
mRNA 3-UTR binding
protein homotetramerization
xenobiotic metabolic process
protein tetramerization
cellular response to xenobiotic stimulus
visual perception
sensory perception of light stimulus
response to xenobiotic stimulus
protein homooligomerization
protein complex oligomerization
zinc ion binding
oxidation-reduction process
sensory perception
nervous system process
protein-containing complex assembly
cellular catabolic process
protein-containing complex subunit organization
system process
CRISPR Data
Compound HitMost Correlated Genes in ChemogenomicsTissues where Essential in the Avana Dataset (DepMap 20Q1)
Compound Hit
No hits were found.
Most Correlated Genes in Chemogenomics
No correlation found to any other genes in chemogenomics.
Tissues where Essential in the Avana Dataset (DepMap 20Q1)
Global Fraction of Cell Lines Where Essential: 0/739