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Results 1 - 5 of 5

EC Number	Substrates	Commentary Substrates	Organism	Products	Commentary (Products)	Reversibility
4.4.1.B1	apocytochrome c1 + heme	-	Saccharomyces cerevisiae	holocytochrome c1	-	?
4.4.1.B1	apocytochrome c1 + heme	-	Homo sapiens	holocytochrome c1	-	?
4.4.1.B1	apocytochrome c1 + heme	no activity with apocytochrome c as substrate	Saccharomyces cerevisiae	holocytochrome c1	-	?
4.4.1.B1	more	Saccharomyces cerevisiae has another, similar enzyme: cytochrome-c-heme lyase, encoded by gene CYT2	Saccharomyces cerevisiae	?	-	?
4.4.1.B1	more	enzyme does not require the presence of putative redox protein Cyc2p, which is dedicated to the reaction of holocytochrome-c synthase, EC 4.4.1.17. A cytochrome c1 mutant with a CAPCH heme-binding site instead of the wild-type CAACH is strictly dependent upon Cyc2p for assembly. Overexpression of CC1HL, as well as mutations of the proline in the CAPCH site to H, L, S, or T residues, can bypass the absence of Cyc2p. The identity of the second intervening residue in the CXXCH motif is key in determining the holocytochrome-c synthase-dependent versus holocytochrome-c1 synthase-dependent assembly of holocytochrome c1	Saccharomyces cerevisiae	?	-	?

Results 1 - 5 of 5

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Release 2023.1 (January 2023)