This entry represents the GAF domain of the sensor region in the cytosolic histidine kinase (HK), PdtaS, from Mycobacterium tuberculosis. The N-terminal region of this protein is comprised of closely linked GAF and PAS domains, both are ubiquitous and form dimeric interfaces. GAF domains are known to bind heme (as can PAS domains), to be involved in redox responses and even to function as catalytic domains [1].

1: The sensor region of the ubiquitous cytosolic sensor kinase, PdtaS, contains PAS and GAF domain sensing modules. Preu J, Panjikar S, Morth P, Jaiswal R, Karunakar P, Tucker PA; J Struct Biol. 2012;177:498-505. PMID:22115998