| Description | This entry represents a group of haemoglobin-like proteins found in eubacteria, cyanobacteria, protozoa, and plants, but not in animals or yeast [ ]. Truncated hemoglobins (TrHbs) have a truncated 2-over-2 rather than the canonical 3-over-3 α-helical sandwich fold []. The variability of the amino acid residues of the heme pocket suggested their partition into three groups that share less than 30% sequence similarity with each other []. This entry includes:HbN (or GlbN): a truncated haemoglobin-like protein that binds oxygen cooperatively with a very high affinity and a slow dissociation rate, which may exclude it from oxygen transport. It appears to be involved in bacterial nitric oxide detoxification and in nitrosative stress [ , ].Cyanoglobin (or GlbN): a truncated haemoprotein found in cyanobacteria that has high oxygen affinity, and which appears to serve as part of a terminal oxidase, rather than as a respiratory pigment [ ]. | Name | Truncated hemoglobin, group 1 |
| Short Name | Hemoglobin_trunc_I | Type | Family |
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