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4.
HLA ; 104(1): e15590, 2024 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-39015092

RESUMO

Non-classical HLA-G*01:46 differs from G*01:01:03:03 at one position in exon 3.


Assuntos
Alelos , Éxons , Antígenos HLA-G , Humanos , Antígenos HLA-G/genética , Brasil , Teste de Histocompatibilidade , Sequência de Bases , Análise de Sequência de DNA/métodos
5.
Proc Natl Acad Sci U S A ; 121(28): e2400151121, 2024 Jul 09.
Artigo em Inglês | MEDLINE | ID: mdl-38954548

RESUMO

Protein folding and evolution are intimately linked phenomena. Here, we revisit the concept of exons as potential protein folding modules across a set of 38 abundant and conserved protein families. Taking advantage of genomic exon-intron organization and extensive protein sequence data, we explore exon boundary conservation and assess the foldon-like behavior of exons using energy landscape theoretic measurements. We found deviations in the exon size distribution from exponential decay indicating selection in evolution. We show that when taken together there is a pronounced tendency to independent foldability for segments corresponding to the more conserved exons, supporting the idea of exon-foldon correspondence. While 45% of the families follow this general trend when analyzed individually, there are some families for which other stronger functional determinants, such as preserving frustrated active sites, may be acting. We further develop a systematic partitioning of protein domains using exon boundary hotspots, showing that minimal common exons correspond with uninterrupted alpha and/or beta elements for the majority of the families but not for all of them.


Assuntos
Éxons , Dobramento de Proteína , Éxons/genética , Humanos , Proteínas/genética , Proteínas/química , Evolução Molecular , Íntrons/genética
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