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- Leghemoglobin abstract "Leghemoglobin (also leghaemoglobin or legoglobin) is a nitrogen or oxygen carrier, because naturally occurring oxygen and nitrogen interact similarly with this protein; and a hemoprotein found in the nitrogen-fixing root nodules of leguminous plants. It is produced by legumes in response to the roots being colonized by nitrogen-fixing bacteria, termed rhizobia, as part of the symbiotic interaction between plant and bacterium: roots not colonized by Rhizobium do not synthesise leghemoglobin. Leghemoglobin has close chemical and structural similarities to hemoglobin, and, like hemoglobin, is red in colour. The holoprotein (protein + heme cofactor) is widely believed to be a product of both plant and the bacterium in which the apoprotein is produced by the plant and the heme (an iron atom bound in a porphyrin ring) is produced by the bacterium. There is some evidence however suggesting that the heme moiety is also produced by the plant.In plants infected with Rhizobium, (such as alfalfa or soybeans), the presence of oxygen in the root nodules would reduce the activity of the oxygen-sensitive nitrogenase - an enzyme responsible for the fixation of atmospheric nitrogen. Leghemoglobin buffers the concentration of free oxygen in the cytoplasm of infected plant cells to ensure the proper function of root nodules. Leghemoglobin has a high affinity for oxygen (a Km of about 0.01 µM), about ten times higher than the β chain of human hemoglobin. This allows an oxygen concentration that is low enough to allow nitrogenase to function but high enough so that it can provide the bacteria with oxygen for respiration.Although leghemoglobin was once thought to provide a buffer for nodule oxygen, recent studies indicate that it stores only enough oxygen to support nodule respiration for a few seconds. Its function is to help provide oxygen to the respiring symbiotic bacterial cells in a manner analogous to hemoglobin transporting oxygen to respiring tissues in animals.Other plants, like Casuarina sp which is an actinorhizal plant, produce a hemoglobin in their symbiotic root nodules.".
- Leghemoglobin thumbnail Leghemoglobin_1FSL.png?width=300.
- Leghemoglobin wikiPageExternalLink 4e.plantphys.net.
- Leghemoglobin wikiPageExternalLink 10.1146%2Fannurev.mi.02.100148.002413.
- Leghemoglobin wikiPageID "97057".
- Leghemoglobin wikiPageRevisionID "605916954".
- Leghemoglobin hasPhotoCollection Leghemoglobin.
- Leghemoglobin subject Category:Hemoproteins.
- Leghemoglobin subject Category:Nitrogen_metabolism.
- Leghemoglobin subject Category:Phytochemicals.
- Leghemoglobin type Abstraction100002137.
- Leghemoglobin type Chemical114806838.
- Leghemoglobin type Compound114818238.
- Leghemoglobin type ConjugatedProtein114731135.
- Leghemoglobin type Hemoprotein114888884.
- Leghemoglobin type Hemoproteins.
- Leghemoglobin type Macromolecule114944888.
- Leghemoglobin type Material114580897.
- Leghemoglobin type Matter100020827.
- Leghemoglobin type Molecule114682133.
- Leghemoglobin type OrganicCompound114727670.
- Leghemoglobin type Part113809207.
- Leghemoglobin type PhysicalEntity100001930.
- Leghemoglobin type Phytochemical114983143.
- Leghemoglobin type Phytochemicals.
- Leghemoglobin type Protein114728724.
- Leghemoglobin type Relation100031921.
- Leghemoglobin type Substance100019613.
- Leghemoglobin type Thing100002452.
- Leghemoglobin type Unit109465459.
- Leghemoglobin comment "Leghemoglobin (also leghaemoglobin or legoglobin) is a nitrogen or oxygen carrier, because naturally occurring oxygen and nitrogen interact similarly with this protein; and a hemoprotein found in the nitrogen-fixing root nodules of leguminous plants. It is produced by legumes in response to the roots being colonized by nitrogen-fixing bacteria, termed rhizobia, as part of the symbiotic interaction between plant and bacterium: roots not colonized by Rhizobium do not synthesise leghemoglobin.".
- Leghemoglobin label "Leg-emoglobina".
- Leghemoglobin label "Leg-hemoglobina".
- Leghemoglobin label "Leghemoglobin".
- Leghemoglobin label "Leghemoglobina".
- Leghemoglobin label "Leghemoglobina".
- Leghemoglobin label "Leghämoglobin".
- Leghemoglobin label "Leghémoglobine".
- Leghemoglobin label "Легоглобин".
- Leghemoglobin sameAs Leghämoglobin.
- Leghemoglobin sameAs Leghemoglobina.
- Leghemoglobin sameAs Leghémoglobine.
- Leghemoglobin sameAs Leg-emoglobina.
- Leghemoglobin sameAs Leghemoglobina.
- Leghemoglobin sameAs Leg-hemoglobina.
- Leghemoglobin sameAs m.0p0qw.
- Leghemoglobin sameAs Q423908.
- Leghemoglobin sameAs Q423908.
- Leghemoglobin sameAs Leghemoglobin.
- Leghemoglobin wasDerivedFrom Leghemoglobin?oldid=605916954.
- Leghemoglobin depiction Leghemoglobin_1FSL.png.
- Leghemoglobin isPrimaryTopicOf Leghemoglobin.