Hemoglobin structure/function and globin-gene evolution in the Arctic fish Liparis tunicatus(801 views) Giordano D, Vergara A, Lee HC, Peisach J, Balestrieri M, Mazzarella L, Parisi E, Di Priseo G, Verde C
Gene (ISSN: 0378-1119), 2007 Dec 30; 406(1-2): 58-68.
Institute of Protein Biochemistry, CNR, Via Pietro Castellino 111, I-80131 Naples, Italy
Dipartimento di Chimica, Università degli Studi di Napoli Federico II, Complesso Monte S. Angelo, Via Cinthia, I-80126 Naples, Italy
Department of Physiology and Biophysics, Albert Einstein College of Medicine, Yeshiva University, 1300 Morris Park Avenue, New York, NY 10461, United States
References: Not available.
Hemoglobin structure/function and globin-gene evolution in the Arctic fish Liparis tunicatus
The importance of the Arctic, in contributing to the knowledge of the overall ensemble of adaptive processes influencing the evolution of marine organisms, calls for investigations on molecular adaptations in Arctic fish. Unlike the vast majority of Antarctic Notothenioidei, several Arctic species display high hemoglobin multiplicity. The blood of four species, the spotted wolffish of the family Anarhichadidae and three Gadidae, contains three functionally distinct major components. Similar to many Antarctic notothenioids, Arctic Liparis tunicatus (suborder Cottoidei, family Liparidae) has one major hemoglobin (Hb 1) accompanied by a minor component (Hb 2). This paper reports the structural and functional characterisation of Hb 1 of L. tunicatus. This hemoglobin shows low oxygen affinity, and pronounced Bohr and Root effects. The amino-acid sequence of the beta chain displays an unusual substitution in NA2 (beta 2) at the phosphate-binding site, and the replacement of Val E11 (beta 67) with Ile. Similar to some Antarctic fish Hbs, electron paramagnetic resonance spectra reveal the fort-nation of a ferric penta-coordinated species even at physiological pH. The amino-acid sequences have also been used to gain insight into the evolutionary history of globins of polar fish. L. tunicatus globins appear close to the notothenioid clades as predicted by teleostean phylogenies. Close phylogenetic relationships between Cottoidei and Notothenioidei, together with their life style, seem to be the main factor driving the globin-sequence evolution. (C) 2007 Elsevier B.V. All rights reserved.
Hemoglobin structure/function and globin-gene evolution in the Arctic fish Liparis tunicatus
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Aloj L, Aurilio M, Rinaldi V, D'Ambrosio L, Tesauro D, Peitl PK, Maina T, Mansi R, Von Guggenberg E, Joosten L, Sosabowski JK, Breeman WA, De Blois E, Koelewijn S, Melis M, Waser B, Beetschen K, Reubi JC, De Jong M * The EEE project(532 views) Proc Int Cosm Ray Conf Icrc Universidad Nacional Autonoma De Mexico, 2007; 5(HEPART2): 977-980. Impact Factor:0 ViewExport to BibTeXExport to EndNote