Maturation of [NiFe]-hydrogenases requires the action of several groups of accessory genes. Homologues of one group of these genes, the so-called hyp genes, putatively encoding proteins participating in the formation of an active uptake hydrogenase in the filamentous, heterocyst-forming cyanobacterium Nostoc PCC 73102, were cloned. The cluster, consisting of hypF, hypC, hypD, hypE, hypA, and hypB, is located 3.8 kb upstream from the uptake hydrogenase-encoding hupSL. Gene expression analyses show that these hyp genes are, like hupL, transcribed under N2-fixing but not under non-N2-fixing growth conditions. Furthermore, the six hyp genes are transcribed together with an open reading frame upstream of hypF, as a single mRNA. Analysis of the DNA region upstream of the experimentally determined transcriptional start site revealed putative -10 and -35 sequence elements and putative binding sites for the global nitrogen regulator NtcA. © 2001 Federation of European Microbiological Societies.
Hansel, A., Axelsson, R., Lindberg, P., Troshina, O. Y., Wünschiers, R., & Lindblad, P. (2001). Cloning and characterisation of a hyp gene cluster in the filamentous cyanobacterium Nostoc sp. strain PCC 73102. FEMS Microbiology Letters, 201(1), 59–64. https://doi.org/10.1016/S0378-1097(01)00240-3