Origin of Genes
نویسندگان
چکیده
منابع مشابه
Evolutionary Origin of Orphan Genes
Orphangenes aregenes thatoccur in specific evolutionary lineages without similarity to genes outside of these lineages and have, therefore, alternatively been named taxonomically restricted genes. They were so far considered to emerge through duplication–divergence processes,but it isnow becomingclear that they canalso arise de novo out of noncoding deoxyribonucleic acid (DNA). This latter proc...
متن کاملAccelerated Evolution of Genes of Recent Origin
The gene content of any genome is a rich mosaic of genes that have originated at different times during evolution. Among the most interesting properties related to gene age is the fact that younger genes tend to show accelerated evolutionary rates with respect to older genes. Here, we use a large number of closely related mammalian genomes to gain further insights into the relationship between ...
متن کاملOrigin of Saxitoxin Biosynthetic Genes in Cyanobacteria
BACKGROUND Paralytic shellfish poisoning (PSP) is a potentially fatal syndrome associated with the consumption of shellfish that have accumulated saxitoxin (STX). STX is produced by microscopic marine dinoflagellate algae. Little is known about the origin and spread of saxitoxin genes in these under-studied eukaryotes. Fortuitously, some freshwater cyanobacteria also produce STX, providing an i...
متن کاملOrigin of phenotypes: genes and transcripts.
While the concept of a gene has been helpful in defining the relationship of a portion of a genome to a phenotype, this traditional term may not be as useful as it once was. Currently, "gene" has come to refer principally to a genomic region producing a polyadenylated mRNA that encodes a protein. However, the recent emergence of a large collection of unannotated transcripts with apparently litt...
متن کاملExtra intestinal pathogenic Escherichia coli from human and avian origin: Detection of the most common virulence-encoding genes
Pathogenic Escherichia coli strains cause a wide range of extra intestinal infections including urinary tract infection in humans and colibacillosis in poultry. They are classified into uropathogenic E. coli (UPEC) and avian pathogenic E. coli (APEC) with genetic similarities and variations. Their pathogenicity is related to the virulence-encoding genes like sfa</...
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ژورنال
عنوان ژورنال: Proceedings of the National Academy of Sciences
سال: 1997
ISSN: 0027-8424,1091-6490
DOI: 10.1073/pnas.94.15.7698