Product Name	HSPB4/Alpha A Crystallin
Chinese Name	热休克蛋白β4抗体
Alias	Acry 1; Alpha crystallin A chain; Alpha-crystallin A chain; CRYA 1; CRYA1; CRYAA; CRYAA_HUMAN; Crystallin Alpha 1; Crystallin alpha A; Heat shock protein beta 4; Heat shock protein beta-4; HSPB 4; HspB4; short form; Zonular Central Nuclear Cataract.
Research Area	Cell biology  immunology  Signal transduction  Cell type markers
Immunogen Species	Rabbit
Clonality	Polyclonal
React Species	(predicted: Human, Mouse, Rat, Dog, Pig, Cow, Rabbit, Sheep, )
Applications	ELISA=1:5000-10000 IHC-P=1:100-500 IHC-F=1:100-500 ICC=1:100-500 IF=1:100-500 （Paraffin sections need antigen repair） not yet tested in other applications. optimal dilutions/concentrations should be determined by the end user.
Theoretical molecular weight	20kDa
Cellular localization	The nucleus cytoplasmic
Form	Liquid
Concentration	1mg/ml
immunogen	KLH conjugated synthetic peptide derived from human HSPB4/Alpha A Crystallin: 81-173/173
Lsotype	IgG
Purification	affinity purified by Protein A
Buffer Solution	0.01M TBS(pH7.4) with 1% BSA, 0.03% Proclin300 and 50% Glycerol.
Storage	Shipped at 4℃. Store at -20 °C for one year. Avoid repeated freeze/thaw cycles.
Attention	This product as supplied is intended for research use only, not for use in human, therapeutic or diagnostic applications.
PubMed	PubMed
Product Detail	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] Function: May contribute to the transparency and refractive index of the lens. Subunit: Heteropolymer composed of three CRYAA and one CRYAB subunits. Inter-subunit bridging via zinc ions enhances stability,which is crucial as there is no protein turn over in the lens. Can also form homodimers and higher homooligomers. Age-dependent C-terminal truncation affects oligomerization. Subcellular Location: Cytoplasm. Nucleus. Translocates to the nucleus during heat shock and resides in sub-nuclear structures known as SC35 speckles or nuclear splicing speckles. Tissue Specificity: Expressed in eye lens. Post-translational modifications: O-glycosylated; contains N-acetylglucosamine side chains. Deamidation of Asn-101 in lens occurs mostly during the first 30 years of age, followed by a small additional amount of deamidation (approximately 5%) during the next approximately 38 years, resulting in a maximum of approximately 50% deamidation during the lifetime of the individual. Phosphorylation on Ser-122 seems to be developmentally regulated. Absent in the first months of life, it appears during the first 12 years of human lifetime. The relative amount of phosphorylated form versus unphosphorylated form does not change over the lifetime of the individual. DISEASE: Defects in CRYAA are a cause of cataract autosomal dominant (ADC) [MIM:604219]. Cataract is an opacification of the crystalline lens of the eye that frequently results in visual impairment or blindness. Opacities vary in morphology, are often confined to a portion of the lens, and may be static or progressive. In general, the more posteriorly located and dense an opacity, the greater the impact on visual function. Cataract is the most common treatable cause of visual disability in childhood. Similarity: Belongs to the small heat shock protein (HSP20) family. SWISS: P02489 Gene ID: 1409 Database links: Entrez Gene: 281718 Cow Entrez Gene: 1409 Human Entrez Gene: 12954 Mouse Entrez Gene: 100009294 Rabbit Entrez Gene: 24273 Rat Omim: 123580 Human SwissProt: P02470 Cow SwissProt: P02498 Elephant SwissProt: P68281 Guinea pig SwissProt: P02497 Hamster SwissProt: P02478 Horse SwissProt: P02489 Human SwissProt: P24622 Mouse SwissProt: P02475 Pig SwissProt: P02493 Rabbit SwissProt: P24623 Rat SwissProt: P02488 Rhesus monkey Unigene: 184085 Human Unigene: 1228 Mouse Unigene: 127769 Rat

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