| 產(chǎn)品介紹 |
background:
The product of this gene belongs to the serine/threonine protein kinase family and to the Ca(2+)/calmodulin-dependent protein kinase subfamily. Calcium signaling is crucial for several aspects of plasticity at glutamatergic synapses. In mammalian cells, the enzyme is composed of four different chains: alpha, beta, gamma, and delta. The product of this gene is a beta chain. It is possible that distinct isoforms of this chain have different cellular localizations and interact differently with calmodulin. Eight transcript variants encoding eight distinct isoforms have been identified for this gene. [provided by RefSeq, Jul 2008].
Function:
Calcium/calmodulin-dependent protein kinase that functions autonomously after Ca(2+)/calmodulin-binding and autophosphorylation, and is involved in dendritic spine and synapse formation, neuronal plasticity and regulation of sarcoplamic reticulum Ca(2+) transport in skeletal muscle. In neurons, plays an essential structural role in the reorganization of the actin cytoskeleton during plasticity by binding and bundling actin filaments in a kinase-independent manner. This structural function is required for correct targeting of CaMK2A, which acts downstream of NMDAR to promote dendritic spine and synapse formation and maintain synaptic plasticity which enables long-term potentiation (LTP) and hippocampus-dependent learning. In developing hippocampal neurons, promotes arborization of the dendritic tree and in mature neurons, promotes dendritic remodeling. Participates in the modulation of skeletal muscle function in response to exercise. In slow-twitch muscles, is involved in regulation of sarcoplamic reticulum (SR) Ca(2+) transport and in fast-twitch muscle participates in the control of Ca(2+) release from the SR through phosphorylation of triadin, a ryanodine receptor-coupling factor, and phospholamban (PLN/PLB), an endogenous inhibitor of SERCA2A/ATP2A2.
Subunit:
CAMK2 is composed of 4 different chains: alpha (CAMK2A), beta (CAMK2B), gamma (CAMK2G), and delta (CAMK2D). The different isoforms assemble into homo- or heteromultimeric holoenzymes composed of 12 subunits with two hexameric rings stacked one on top of the other. Interacts with SYNGAP1 and CAMK2N2 (By similarity). Interacts with MPDZ.
Subcellular Location:
Cytoplasm, cytoskeleton. Cytoplasm, cytoskeleton, centrosome. Sarcoplasmic reticulum membrane; Peripheral membrane protein; Cytoplasmic side. Note=In slow-twitch muscle, evenly distributed between longitudinal SR and junctional SR.
Tissue Specificity:
Widely expressed. Expressed in adult and fetal brain. Expression is slightly lower in fetal brain. Expressed in skeletal muscle.
Post-translational modifications:
Autophosphorylation of Thr-287 following activation by Ca(2+)/calmodulin. Phosphorylation of Thr-287 locks the kinase into an activated state.
Similarity:
Belongs to the protein kinase superfamily. CAMK Ser/Thr protein kinase family. CaMK subfamily.
Contains 1 protein kinase domain.
Database links:
Entrez Gene: 815 Human
Entrez Gene: 816 Human
Entrez Gene: 817 Human
Entrez Gene: 108058 Mouse
Entrez Gene: 12322 Mouse
Entrez Gene: 12323 Mouse
Entrez Gene: 24245 Rat
Entrez Gene: 24246 Rat
Entrez Gene: 25400 Rat
Omim: 114078 Human
Omim: 607707 Human
Omim: 607708 Human
SwissProt: Q13554 Human
SwissProt: Q13557 Human
SwissProt: Q9UQM7 Human
SwissProt: P11798 Mouse
SwissProt: P28652 Mouse
SwissProt: Q6PHZ2 Mouse
SwissProt: P08413 Rat
SwissProt: P11275 Rat
SwissProt: P15791 Rat
Important Note:
This product as supplied is intended for research use only, not for use in human, therapeutic or diagnostic applications.
CaMK2b也是絲/蘇氨基酸激酶的一種，同屬于Ca++/鈣調(diào)素依賴性蛋白質(zhì)激酶家族成員。鈣／鈣調(diào)素依賴性蛋白激酶Ⅱb（CaMKⅡb）廣泛分布于中樞神經(jīng)系統(tǒng)內(nèi)，參與調(diào)節(jié)神經(jīng)遞質(zhì)的合成釋放、信號轉(zhuǎn)導(dǎo)和突觸可塑性的形成以及磷酸化蛋白
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