PROSITE documentation PDOC00183Plant hemoglobins signature
Leghemoglobins [1] are hemoproteins present in the root nodules of leguminous plants. Leghemoglobins are structurally and functionally related to hemoglobin and myoglobin. By providing oxygen to the bacteroids, they are essential for symbiotic nitrogen fixation.
Structurally related hemoglobins are found in nonsymbiotic plants where they may not function as an oxygen storage or transport proteins, but might act as an oxygen sensors [2].
We have developed a signature pattern that exclusively picks up the sequence of plants hemoglobins. It is centered on an histidine that acts as the heme iron distal ligand.
Last update:December 2001 / Pattern and text revised.
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PROSITE method (with tools and information) covered by this documentation:
| 1 | Authors | Powell R. Gannon F. |
| Title | The leghaemoglobins. | |
| Source | BioEssays 9:117-121(1988). | |
| PubMed ID | 2906540 |
| 2 | Authors | Arredondo-Peter R. Hargrove M.S. Moran J.F. Sarath G. Klucas R.V. |
| Source | Plant Physiol. 118:1121-1126(1998). |
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