Linkage of human spermatid-specific basic nuclear protein genes. Definition and evolution of the P1-->P2-->TP2 locus

Protamines and transition proteins are highly basic sperm-specific nuclear proteins that serve to compact the DNA within the condensing spermatid nucleus. It has been proposed that the genes for protamine P1 and P2 and transition protein 2 may be clustered at a single loci. This may have marked impl...

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Veröffentlicht in:The Journal of biological chemistry 1993-02, Vol.268 (4), p.2932-2936
Hauptverfasser: NELSON, J. E, KRAWETZ, S. A
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KRAWETZ, S. A
description Protamines and transition proteins are highly basic sperm-specific nuclear proteins that serve to compact the DNA within the condensing spermatid nucleus. It has been proposed that the genes for protamine P1 and P2 and transition protein 2 may be clustered at a single loci. This may have marked implications for their evolution and coordinate developmental regulation. The cloning of a contiguous segment encompassing this region would directly address these issues. We have utilized a cloned segment of the human protamine P1 gene to isolate a human cosmid clone which contains the genes for protamines P1 and P2 and transition protein TP2. Sequence and hybridization analysis of this cosmid showed that the TP2 gene resided 3' of the P2 gene at a distance of approximately 7 kilobases (kb). This establishes the order of this gene cluster within a 13-kb region of 16p13.13-16p13.2 to be P1-->P2-->TP2. Similar to their spatial order, comparative computer-assisted sequence analysis predicts an identical relative rank order of emergence. Accordingly we propose that this gene cluster may have arisen from the P1 gene through a series of gene duplication events.
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Definition and evolution of the P1--&gt;P2--&gt;TP2 locus</atitle><jtitle>The Journal of biological chemistry</jtitle><addtitle>J Biol Chem</addtitle><date>1993-02-05</date><risdate>1993</risdate><volume>268</volume><issue>4</issue><spage>2932</spage><epage>2936</epage><pages>2932-2936</pages><issn>0021-9258</issn><eissn>1083-351X</eissn><coden>JBCHA3</coden><abstract>Protamines and transition proteins are highly basic sperm-specific nuclear proteins that serve to compact the DNA within the condensing spermatid nucleus. It has been proposed that the genes for protamine P1 and P2 and transition protein 2 may be clustered at a single loci. This may have marked implications for their evolution and coordinate developmental regulation. The cloning of a contiguous segment encompassing this region would directly address these issues. 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source MEDLINE; EZB-FREE-00999 freely available EZB journals; Alma/SFX Local Collection
subjects Amino Acid Sequence
Base Sequence
Biological and medical sciences
Biological Evolution
Chromosomal Proteins, Non-Histone - genetics
Chromosomes, Human, Pair 16
Cloning, Molecular
Fundamental and applied biological sciences. Psychology
Genes
Genes. Genome
Genetic Linkage
Humans
Male
Molecular and cellular biology
Molecular genetics
Molecular Sequence Data
Multigene Family
Nuclear Proteins - genetics
Restriction Mapping
Sequence Homology, Amino Acid
Spermatids - physiology
title Linkage of human spermatid-specific basic nuclear protein genes. Definition and evolution of the P1-->P2-->TP2 locus
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