| Structure, function and molecular adaptations of haemoglobins of the polar cartilaginous fish Bathyraja eatonii and Raja hyperborea. | |
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MedLine Citation:
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PMID: 15807670 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Cartilaginous fish are very ancient organisms. In the Antarctic sea, the modern chondrichthyan genera are poorly represented, with only three species of sharks and eight species of skates; the paucity of chondrichthyans is probably an ecological consequence of unusual trophic or habitat conditions in the Southern Ocean. In the Arctic, there are 26 species belonging to the class Chondrichthyes. Fish in the two polar regions have been subjected to different regional histories that have influenced the development of diversity: Antarctic marine organisms are highly stenothermal, in response to stable water temperatures, whereas the Arctic communities are exposed to seasonal temperature variations. The structure and function of the oxygen-transport haem protein from the Antarctic skate Bathyraja eatonii and from the Arctic skate Raja hyperborea (both of the subclass Elasmobranchii, order Rajiformes, family Rajidae) is reported in the present paper. These species have a single major haemoglobin (Hb 1; over 80% of the total). The Bohr-proton and the organophosphate-binding sites are absent. Thus the haemoglobins of northern and southern polar skates appear functionally similar, whereas differences were observed with several temperate elasmobranchs. Such evidence suggests that, in temperate and polar habitats, physiological adaptations have evolved along distinct pathways, whereas, in this case, the effect of the differences characterizing the two polar environments is negligible. |
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Authors:
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Cinzia Verde; M Cristina De Rosa; Daniela Giordano; Donato Mosca; Donatella De Pascale; Luca Raiola; Ennio Cocca; Vitale Carratore; Bruno Giardina; Guido Di Prisco |
Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: The Biochemical journal Volume: 389 ISSN: 1470-8728 ISO Abbreviation: Biochem. J. Publication Date: 2005 Jul |
Date Detail:
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Created Date: 2005-07-04 Completed Date: 2005-12-21 Revised Date: 2009-11-18 |
Medline Journal Info:
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Nlm Unique ID: 2984726R Medline TA: Biochem J Country: England |
Other Details:
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Languages: eng Pagination: 297-306 Citation Subset: IM |
Affiliation:
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Institute of Protein Biochemistry, CNR, Via Marconi 12, I-80125 Naples, Italy. |
| Data Bank Information | |
Bank Name/Acc. No.:
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GENBANK/AY772716; AY772717; AY773131; AY773132; SWISSPROT/P84216; P84217 |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Amino Acid Sequence Animals Antarctic Regions Arctic Regions Binding Sites Heme / metabolism Hemoglobins / chemistry*, genetics, metabolism* Models, Molecular Molecular Sequence Data Oxygen / metabolism Phosphoric Acid Esters / metabolism Protein Binding Sequence Homology, Amino Acid Skates (Fish)* / genetics Thermodynamics |
| Chemical | |
Reg. No./Substance:
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0/Hemoglobins; 0/Phosphoric Acid Esters; 14875-96-8/Heme; 7782-44-7/Oxygen |
| Comments/Corrections | |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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