Hemerythrin (also spelled haemerythrin; Ancient Greek: αἷμα, romanized: haîma, lit. 'blood', Ancient Greek: ἐρυθρός, romanized: erythrós, lit. 'red') is an oligomeric protein responsible for oxygen (O2) transport in the marine invertebrate phyla of sipunculids, priapulids, brachiopods, and in a single annelid worm genus, Magelona. Myohemerythrin is a monomeric O2-binding protein found in the muscles of marine invertebrates. Hemerythrin and myohemerythrin are essentially colorless when deoxygenated, but turn a violet-pink in the oxygenated state.
Hemerythrin does not, as the name might suggest, contain a heme. The names of the blood oxygen transporters hemoglobin, hemocyanin, and hemerythrin do not refer to the heme group (only found in globins). Instead, these names are derived from the Greek word for blood. Hemerythrin may also contribute to innate immunity and anterior tissue regeneration in certain worms.[1]
^Coates, C.J., Decker, H. (2017). "Immunological properties of oxygen transport proteins: hemoglobin, hemocyanin and hemerythrin". Cell. Mol. Life Sci. 74 (2): 293–317. doi:10.1007/s00018-016-2326-7. PMC 5219038. PMID 27518203.{{cite journal}}: CS1 maint: multiple names: authors list (link)
respiratory pigment: hemoglobin, hemocyanin, erythrocruorin–chlorocruorin, and hemerythrin. The heme-containing globin is the most commonly-occurring respiratory...
effect). Other animals use hemocyanin (molluscs and some arthropods) or hemerythrin (spiders and lobsters). A liter of blood can dissolve 200 cm3 of O 2...
splitting and smaller ionic radius of Fe2+ in the oxyhemoglobin moiety. Hemerythrin is another iron-containing oxygen carrier. The oxygen binding site is...
"Atomic models for the polypeptide backbones of myohemerythrin and hemerythrin". Biochemical and Biophysical Research Communications. 66 (4): 1349–1356...
inspired by oxygen-carrying proteins such as myoglobin, hemoglobin, hemerythrin, and hemocyanin. Several transition metals form complexes with O2, and...
and hemocyanin were less affected by the extinction than animals with hemerythrin or relying on diffusion of oxygen. Zhou et al. (2024) report the discovery...
groups instead of iron heme groups and is blue in color when oxygenated. Hemerythrin Some marine invertebrates and a few species of annelid use this iron-containing...
University of Jena in 1884. Krukenberg examined biological pigments such as hemerythrin, lipochromes, and the colours of eggs (being the first to identify biliverdin...
biology. Other oxygen transport systems include myoglobin, hemocyanin, and hemerythrin. Oxidases and oxygenases are metal systems found throughout nature that...
proteins have diiron active sites, e.g. ribonucleotide reductase and hemerythrin. Usually binucleating ligands feature bridging ligands, such as phenoxide...
fluid inside the tentacular system where it is taken up by the pigment hemerythrin in the blood cells. The oxygen further diffuses through an elaborate...
"Atomic models for the polypeptide backbones of myohemerythrin and hemerythrin". Biochemical and Biophysical Research Communications. 66 (4): 1349–56...
"Atomic models for the polypeptide backbones of myohemerythrin and hemerythrin". Biochemical and Biophysical Research Communications. 66 (4): 1349–1356...
complex with the EDTA anion Ferric bis(iminodiacetate) Active site of hemerythrin, an O2-carrying iron-carboxylate A commercially important family of metal...
In some species oxygen is partly carried by the respiratory pigment hemerythrin, which is transported in coelomocyte cells. The maximum oxygen consumption...
"Atomic models for the polypeptide backbones of myohemerythrin and hemerythrin". Biochemical and Biophysical Research Communications. 66 (4): 1349–1356...
"Atomic models for the polypeptide backbones of myohemerythrin and hemerythrin". Biochemical and Biophysical Research Communications. 66 (4): 1349–1356...
including examples of the Cu2(μ-η2,η2-O2) bonding mode. Models for hemerythrin, an enzyme with a diiron active site, and xanthine oxidase, a molybdoenzyme...
gas exchange. They are pink inside due to the presence of the pigment hemerythrin used in oxygen transport. The anus is on a small mound where the trunk...
but other animals use hemocyanin (molluscs and some arthropods) or hemerythrin (spiders and lobsters). A liter of blood can dissolve 200 cc of oxygen...
characteristic of many metalloenzymes—including the dioxygen carrier protein, hemerythrin; the dinuclear non-heme iron protein, ribonucleotide reductase; leucine...
compounds by O2. Iron can be taken up selectively as ferredoxins, Fe-O-Fe (hemerythrin and ribonucleotide reductase), Fe (many oxidases), apart from iron porphyrin...
pyrophosphatase activity from Desulfovibrio vulgaris. Comparison with hemerythrin and rubredoxin". Journal of Biological Chemistry. 266 (31): 20645–20653...
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