Structure and Evolution of Four POU Domain Genes Expressed in Mouse Brain

Four mouse POU domain genomic DNA clones-Brain-1, Brain-2, Brain-4, and Scip-and Brain-2 cDNA, which are expressed in adult brain, were cloned and the coding and noncoding regions of the genes were sequenced. The amino acid sequences of the four POU domains are highly conserved; sequences in other r...

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Veröffentlicht in:Proceedings of the National Academy of Sciences - PNAS 1992-04, Vol.89 (8), p.3280-3284
Hauptverfasser: Hara, Yoshinobu, Rovescalli, Alessandra C., Kim, Yongsok, Nirenberg, Marshall
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container_title Proceedings of the National Academy of Sciences - PNAS
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creator Hara, Yoshinobu
Rovescalli, Alessandra C.
Kim, Yongsok
Nirenberg, Marshall
description Four mouse POU domain genomic DNA clones-Brain-1, Brain-2, Brain-4, and Scip-and Brain-2 cDNA, which are expressed in adult brain, were cloned and the coding and noncoding regions of the genes were sequenced. The amino acid sequences of the four POU domains are highly conserved; sequences in other regions of the proteins also are conserved but to a lesser extent. The absence of introns from the coding regions of the four POU domain genes and the similarity of amino acid sequences of the corresponding proteins suggest that the coding region of the ancestral class III POU domain gene lacked introns and therefore may have originated by reverse transcription of a molecule of POU domain mRNA followed by insertion of the cDNA into germ cell genomic DNA. Additional duplications of the ancestral class III POU domain gene (or mRNA) would create the Brain-1, Brain-2, Brain-4, and Scip genes.
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The amino acid sequences of the four POU domains are highly conserved; sequences in other regions of the proteins also are conserved but to a lesser extent. The absence of introns from the coding regions of the four POU domain genes and the similarity of amino acid sequences of the corresponding proteins suggest that the coding region of the ancestral class III POU domain gene lacked introns and therefore may have originated by reverse transcription of a molecule of POU domain mRNA followed by insertion of the cDNA into germ cell genomic DNA. 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The amino acid sequences of the four POU domains are highly conserved; sequences in other regions of the proteins also are conserved but to a lesser extent. The absence of introns from the coding regions of the four POU domain genes and the similarity of amino acid sequences of the corresponding proteins suggest that the coding region of the ancestral class III POU domain gene lacked introns and therefore may have originated by reverse transcription of a molecule of POU domain mRNA followed by insertion of the cDNA into germ cell genomic DNA. Additional duplications of the ancestral class III POU domain gene (or mRNA) would create the Brain-1, Brain-2, Brain-4, and Scip genes.</abstract><cop>Washington, DC</cop><pub>National Academy of Sciences of the United States of America</pub><pmid>1565620</pmid><doi>10.1073/pnas.89.8.3280</doi><tpages>5</tpages><oa>free_for_read</oa></addata></record>
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source MEDLINE; PubMed Central; Alma/SFX Local Collection; Free Full-Text Journals in Chemistry; JSTOR
subjects Amino Acid Sequence
Amino acids
Animals
Base Sequence
Biological and medical sciences
Biological Evolution
Brain
Brain - physiology
cDNA
Cloning, Molecular
Complementary DNA
Deoxyribonucleic acid
DNA
DNA - genetics
DNA - isolation & purification
DNA probes
DNA-Binding Proteins - genetics
evolution
Fundamental and applied biological sciences. Psychology
Gene Expression
Genes. Genome
Genetics
Genomics
Mice
Molecular and cellular biology
Molecular genetics
Molecular Sequence Data
Nerve Tissue Proteins - genetics
Nucleotide sequences
Nucleotides
Octamer Transcription Factor-6
Oligonucleotide Probes
Open reading frames
POU Domain Factors
Proteins
RNA
RNA, Messenger - genetics
Rodents
Sequence Homology, Nucleic Acid
Transcription Factors - genetics
title Structure and Evolution of Four POU Domain Genes Expressed in Mouse Brain
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