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Crystal Structure of the blue-light absorbing form of the Thermosynechococcus elongatus PixJ GAF-domain
Annotation data related to this entry.
4GLQ
  •   Protein Family Annotation: Pfam Classification   Hide
    Chain Pfam Accession Pfam Family Identifier Pfam Description Type Comment
    A PF01590   GAF GAF domain Domain This domain is present in cGMP-specific phosphodiesterases, adenylyl and guanylyl cyclases, phytochromes, FhlA and NifA. Adenylyl and guanylyl cyclases catalyse ATP and GTP to the second messengers cAMP and cGMP, respectively, these products up-regulating catalytic activity by binding to the regulatory GAF domain(s). The opposite hydrolysis reaction is catalysed by phosphodiesterase. cGMP-dependent 3',5'-cyclic phosphodiesterase catalyses the conversion of guanosine 3',5'-cyclic phosphate to guanosine 5'-phosphate. Here too, cGMP regulates catalytic activity by GAF-domain binding. Phytochromes are regulatory photoreceptors in plants and bacteria which exist in two thermally-stable states that are reversibly inter-convertible by light: the Pr state absorbs maximally in the red region of the spectrum, while the Pfr state absorbs maximally in the far-red region. This domain is also found in FhlA (formate hydrogen lyase transcriptional activator) and NifA, a transcriptional activator which is required for activation of most Nif operons which are directly involved in nitrogen fixation. NifA interacts with sigma-54. Source: Pfam  
    A PF13492   GAF_3 GAF domain Domain Source: Pfam  
     
  •   Gene Product Annotation: GO Terms   Hide
    Polymer Molecular Function Biological Process Cellular Component
    Methyl-accepting chemotaxis protein (4GLQ:A)
    • none
    • none
     
  •   Structural Biology Knowledgebase Data Hide
     
 
Annotations in orange boxes have been gathered from external resources.