PMID- 15811506 OWN - NLM STAT- MEDLINE DCOM- 20050613 LR - 20131121 IS - 0162-0134 (Print) IS - 0162-0134 (Linking) VI - 99 IP - 4 DP - 2005 Apr TI - Ligand specificity of H-NOX domains: from sGC to bacterial NO sensors. PG - 892-902 AB - Soluble guanylate cyclase (sGC) is a nitric oxide (NO) sensing hemoprotein that has been found in eukaryotes from Drosophila to humans. Prokaryotic proteins with significant homology to the heme domain of sGC have recently been identified through genomic analysis. This family of heme proteins has been named the H-NOX domain, for Heme-Nitric oxide/OXygen binding domain. The key observation from initial studies in this family is that some members, those proteins from most eukaryotes and facultative aerobic prokaryotes, bind NO in a five-coordinate heme complex, but do not bind oxygen (O(2)), the same ligand binding characteristics as sGC. H-NOX family members from obligate aerobic prokaryotes bind O(2) and NO in six-coordinate complexes, similar to the globins and other O(2)-sensing heme proteins. The molecular factors that contribute to these differences in ligand specificity, within a family of sequence related proteins, are the subject of this review. FAU - Boon, Elizabeth M AU - Boon EM AD - Department of Chemistry, Lawrence Berkeley National Laboratory, University of California-Berkeley, Berkeley, CA 94705-1460, USA. FAU - Marletta, Michael A AU - Marletta MA LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PT - Review PL - United States TA - J Inorg Biochem JT - Journal of inorganic biochemistry JID - 7905788 RN - 0 (Bacterial Proteins) RN - 0 (Ligands) RN - 31C4KY9ESH (Nitric Oxide) RN - 42VZT0U6YR (Heme) RN - EC 4.6.1.2 (Guanylate Cyclase) RN - S88TT14065 (Oxygen) SB - IM MH - Amino Acid Sequence MH - Animals MH - Bacterial Proteins/metabolism MH - *Biosensing Techniques MH - Drosophila/enzymology MH - Genomics MH - Guanylate Cyclase/chemistry/genetics/*metabolism MH - Heme/*chemistry MH - Ligands MH - Molecular Sequence Data MH - Nitric Oxide/*chemistry MH - Oxygen/chemistry MH - Prokaryotic Cells/metabolism MH - Protein Binding MH - Sequence Alignment RF - 81 EDAT- 2005/04/07 09:00 MHDA- 2005/06/14 09:00 CRDT- 2005/04/07 09:00 PHST- 2004/11/12 00:00 [received] PHST- 2004/11/26 00:00 [revised] PHST- 2004/12/17 00:00 [accepted] PHST- 2005/04/07 09:00 [pubmed] PHST- 2005/06/14 09:00 [medline] PHST- 2005/04/07 09:00 [entrez] AID - S0162-0134(04)00420-9 [pii] AID - 10.1016/j.jinorgbio.2004.12.016 [doi] PST - ppublish SO - J Inorg Biochem. 2005 Apr;99(4):892-902. doi: 10.1016/j.jinorgbio.2004.12.016.