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The primary structure of a chondrichthyan protamine: A new apparent contradiction in protamine evolution

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The primary structure of a chondrichthyan protamine: A new apparent contradiction in protamine evolution

Auteurs : Núria Saperas [Espagne] ; Carlos Buesa [Belgique] ; Joaquin Abián [Espagne] ; Jöel Vandekerckhove [Belgique] ; Harold E. Kasinsky [Canada] ; Manel Chival [Espagne]

Source :

Journal of Molecular Evolution [ 0022-2844 ] ; 1996-11-01.

RBID : ISTEX:16404653625A8BC1DA7DCA95383C7083E7472730

Abstract

Abstract: We have determined the primary structure of protamine R3 from ratfish (Hydrolagus colliei), a species belonging to the order Chimaeriformes (an old phylogenetic line among the chondrichthyes). Protamine R3 contains 48 residues organized as follows: ARRRH SMKKK RKSVR RRKTR KNQRK RKNSL GRSFK (Q/A)HGFL KQPPR FRP. Comparison of this sequence with both protamine Z3 fromScyliorhinus canicula (a chondrichthyan) and typical protamines from bony fish generates an apparent contradiction: Two relatively close species (H. colhei andS. canicula, both chondichthyes) display different protamines, whereas species more distant in evolution (S. canicula and bony fish) contain very similar protamine molecules. We note that this is not an isolated case in the evolution of sperm nuclear basic proteins (SNBPs) and discuss the possible significance of this fact.

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https://api.istex.fr/document/16404653625A8BC1DA7DCA95383C7083E7472730/fulltext/pdf

DOI: 10.1007/BF02337524

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Le document en format XML

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<front><div type="abstract" xml:lang="en">Abstract: We have determined the primary structure of protamine R3 from ratfish (Hydrolagus colliei), a species belonging to the order Chimaeriformes (an old phylogenetic line among the chondrichthyes). Protamine R3 contains 48 residues organized as follows: ARRRH SMKKK RKSVR RRKTR KNQRK RKNSL GRSFK (Q/A)HGFL KQPPR FRP. Comparison of this sequence with both protamine Z3 fromScyliorhinus canicula (a chondrichthyan) and typical protamines from bony fish generates an apparent contradiction: Two relatively close species (H. colhei andS. canicula, both chondichthyes) display different protamines, whereas species more distant in evolution (S. canicula and bony fish) contain very similar protamine molecules. We note that this is not an isolated case in the evolution of sperm nuclear basic proteins (SNBPs) and discuss the possible significance of this fact.</div>
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The primary structure of a chondrichthyan protamine: A new apparent contradiction in protamine evolution

The primary structure of a chondrichthyan protamine: A new apparent contradiction in protamine evolution

Source :

Abstract

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