Journal
ACS CHEMICAL BIOLOGY
Volume 6, Issue 11, Pages 1156-1163Publisher
AMER CHEMICAL SOC
DOI: 10.1021/cb200231c
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Funding
- Academy of Finland [139031]
- Russian Foundation for Basic Research [09-04-00869]
- Academy of Finland (AKA) [139031, 139031] Funding Source: Academy of Finland (AKA)
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Regulatory CBS (cystathionine beta-synthase) domains exist as two or four tandem copies in thousands of cytosolic and membrane-associated proteins from all kingdoms of life Mutations in the CBS domains of human enzymes and membrane channels are associated with an array of hereditary diseases. Four CBS domains encoded within a single polypeptide or two identical polypeptidess (each having a pair of CBS domains at the subunit interface) form a highly conserved disk like structure. CBS domains act as autoinhibitory regulatory units in some proteins and activate or further inhibit protein function upon binding to adenosine nucleotides (AMP, ADP, ATP, S-adenosyl methionine, NAD, diadenosine polyphosphates). As a result of the differential effects of the nucleotides, CBS domain-containing proteins can sense cell energy levels. Significant conformational changes are induced in CBS domains by bound ligands, highlighting the structural basis for their effects.
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