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Titolo:
Activation of calcium/calmodulin regulated kinases
Autore:
Wilmanns, M; Gautel, M; Mayans, O;
Indirizzi:
EMBL, DESY, D-22603 Hamburg, Germany EMBL Hamburg Germany D-22603EMBL, DESY, D-22603 Hamburg, Germany Max Planck Inst Mol Physiol, Dept Phys Biochem, D-44202 Dortmund, Germany Max Planck Inst Mol Physiol Dortmund Germany D-44202 2 Dortmund, Germany
Titolo Testata:
CELLULAR AND MOLECULAR BIOLOGY
fascicolo: 5, volume: 46, anno: 2000,
pagine: 883 - 894
SICI:
0145-5680(200007)46:5<883:AOCRK>2.0.ZU;2-3
Fonte:
ISI
Lingua:
ENG
Soggetto:
LIGHT-CHAIN KINASE; GIANT PROTEIN-KINASES; PHOSPHORYLASE-KINASE; STRUCTURAL BASIS; CALMODULIN-BINDING; CRYSTAL-STRUCTURE; INTRASTERIC REGULATION; SUBSTRATE RECOGNITION; NEUTRON-SCATTERING; PEPTIDE SUBSTRATE;
Keywords:
protein kinase; calmodulin; phosphorylation; regulation;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
35
Recensione:
Indirizzi per estratti:
Indirizzo: Wilmanns, M EMBL, DESY, Notkestr 85, D-22603 Hamburg, Germany EMBL Notkestr 85 Hamburg Germany D-22603 603 Hamburg, Germany
Citazione:
M. Wilmanns et al., "Activation of calcium/calmodulin regulated kinases", CELL MOL B, 46(5), 2000, pp. 883-894

Abstract

Among numerous protein kinases found in mammalian cell systems there is a distinct subfamily of serine/threonine kinases that are regulated by calmodulin or other related activators in a calcium concentration dependent manner. Members of this family are involved in various cellular processes like cell proliferation and death, cell motility and metabolic pathways. In this contribution we shall review the available structural biology data on five members of this kinase family (calcium / calmodulin dependent kinase, twitchin kinase, titin kinase, phosphorylase kinase, myosin light chain kinase). As a common element, all these kinases contain a regulatory tail, which isC-terminal to their catalytic domain. The available 3D structures of two members, the serine/threonine kinases of the giant muscle proteins twitchin and titin in the autoinhibited conformation, show how this regulatory tail blocks their active sites. The structures suggest that activation of these kinases requires unblocking the active site from the C-terminal extension and conformational rearrangement of the active site loops. Small angle scattering data for myosin light chain kinase indicate a complete release of theC-terminal extension upon calcium / calmodulin binding. In addition, members of this family are regulated by diverse add-on mechanisms, including phosphorylation of residues within the activation segment or the P+1 loop as well as by additional regulatory subunits. The available structural data lead to the hypothesis of two different activation mechanisms upon binding to calcium sensitive proteins. In one model, the regulatory tail is entirely released ("fall-apart"). The alternative model ("looping-out") proposes a two-anchored release mechanism.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 04/12/20 alle ore 22:05:59