alpha A Crystallin (CRYAA) (NM_000394) Human Recombinant Protein

Specifications

Product Data
Species	Human
Expression Host	E. coli
Expression cDNA Clone or AA Sequence	Protein Sequence (showhide) Met1-Ser173
Tag	C-His
Predicted MW	20.9 kDa
Concentration	lot specific
Purity	>95% as determined by SDS-PAGE and Coomassie blue staining
Buffer	Lyophilized from a 0.2 um filtered solution of PBS, 2mM EDTA, pH 8.0.
Storage	Lyophilized protein should be stored at < -20°C, though stable at room temperature for 3 weeks. Reconstituted protein solution can be stored at 4-7°C for 2-7 days. Aliquots of reconstituted samples are stable at < -20°C for 3 months.
Stability	Stable for at least 6 months from date of receipt under proper storage and handling conditions.
Endotoxin	Endotoxin level is < 0.1 ng/µg of protein (< 1 EU/µg)
Reference Data
RefSeq	NP_000385
Locus ID	1409
UniProt ID	A0A140G945
Refseq Size	1162
Cytogenetics	21q22.3
Refseq ORF	519
Synonyms	CRYA1; CTRCT9; HSPB4
Summary	Mammalian lens crystallins are divided into alpha, beta, and gamma families. Alpha crystallins are composed of two gene products: alpha-A and alpha-B, for acidic and basic, respectively. Alpha crystallins can be induced by heat shock and are members of the small heat shock protein (HSP20) family. They act as molecular chaperones although they do not renature proteins and release them in the fashion of a true chaperone; instead they hold them in large soluble aggregates. Post-translational modifications decrease the ability to chaperone. These heterogeneous aggregates consist of 30-40 subunits; the alpha-A and alpha-B subunits have a 3:1 ratio, respectively. Two additional functions of alpha crystallins are an autokinase activity and participation in the intracellular architecture. The encoded protein has been identified as a moonlighting protein based on its ability to perform mechanistically distinct functions. Alpha-A and alpha-B gene products are differentially expressed; alpha-A is preferentially restricted to the lens and alpha-B is expressed widely in many tissues and organs. Defects in this gene cause autosomal dominant congenital cataract (ADCC). [provided by RefSeq, Jan 2014]

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