Metazoa
Mostrando 13-24 de 74 artigos, teses e dissertações.
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13. A comparative sequence analysis reveals a common GBD/FH3-FH1-FH2-DAD architecture in formins from Dictyostelium, fungi and metazoa
BioMed Central.
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14. Molecular phylogenetic analyses of the mitochondrial ADP-ATP carriers: The Plantae/Fungi/Metazoa trichotomy revisited
We investigated the basal phylogeny of eukaryotes through analyses of sequences from the ADP–ATP mitochondrial carrier, a transmembrane protein that is stable in function across eukaryote kingdoms. The ADP–ATP data strongly suggest the grouping of Plantae and Fungi to the exclusion of Metazoa. We implemented several procedures to avoid pervasive analytic
The National Academy of Sciences.
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15. A novel clade of protistan parasites near the animal-fungal divergence.
Sequences of nuclear-encoded small-subunit rRNA genes have been determined for representatives of the enigmatic genera Dermocystidium, Ichthyophonus, and Psorospermium, protistan parasites of fish and crustaceans. The small-subunit rRNA genes from these parasites and from the "rosette agent" (also a parasite of fish) together form a novel, statistically supp
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16. Linker histone variants control chromatin dynamics during early embryogenesis
Complex transitions in chromatin structure produce changes in genome function during development in metazoa. Linker histones, the last component of nucleosomes to be assembled into chromatin, comprise considerably divergent subtypes as compared with core histones. In all metazoa studied, their composition changes dramatically during early embryogenesis conco
National Academy of Sciences.
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17. The ets multigene family is conserved throughout the Metazoa.
This study provides the first empirical evidence for the conservation of the ets proto-oncogene transcription factor family throughout the Metazoa. Using the polymerase chain reaction with degenerate primers corresponding to conserved sequences within the ETS DNA-binding domain, we have detected ets genes in a range of lower metazoans, including sponges, cte
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18. Distribution and Evolution of von Willebrand/Integrin A Domains: Widely Dispersed Domains with Roles in Cell Adhesion and ElsewhereD⃞
The von Willebrand A (VWA) domain is a well-studied domain involved in cell adhesion, in extracellular matrix proteins, and in integrin receptors. A number of human diseases arise from mutations in VWA domains. We have analyzed the phylogenetic distribution of this domain and the relationships among ∼500 proteins containing this domain. Although the majori
The American Society for Cell Biology.
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19. Genome analysis: RNA recognition motif (RRM) and K homology (KH) domain RNA-binding proteins from the flowering plant Arabidopsis thaliana
Regulation of gene expression at the post-transcriptional level is mainly achieved by proteins containing well-defined sequence motifs involved in RNA binding. The most widely spread motifs are the RNA recognition motif (RRM) and the K homology (KH) domain. In this article, we survey the complete Arabidopsis thaliana genome for proteins containing RRM and KH
Oxford University Press.
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20. Comparisons of eukaryotic genomic sequences.
A method for assessing genomic similarity based on relative abundances of short oligonucleotides in large DNA samples is introduced. The method requires neither homologous sequences nor prior sequence alignments. The analysis centers on (i) dinucleotide (and tri- and tetra-) relative abundance extremes in genomic sequences, (ii) distances between sequences b
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21. A novel, tissue-specific, Drosophila homeobox gene.
The homeobox gene family of Drosophila appears to control a variety of position-specific patterning decisions during embryonic and imaginal development. Most of these patterning decisions determine groups of cells on the anterior-posterior axis of the Drosophila germ band. We have isolated a novel homeobox gene from Drosophila, designated H2.0. H2.0 has the
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22. Conservation of the prohormone convertase gene family in metazoa: analysis of cDNAs encoding a PC3-like protein from hydra.
A subclass of proteolytic enzymes that correctly cleave precursor proteins at paired basic residues and are structurally related to the bacterial subtilisins has recently been identified. In yeast, a single membrane-bound proteolytic processing enzyme encoded by the kex2 gene has been found, whereas in higher vertebrates cDNAs encoding four distinct enzymes
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23. Update of AMmtDB: a database of multi-aligned Metazoa mitochondrial DNA sequences
The AMmtDB database (http://bio-www.ba.cnr.it:8000/srs6/ ) has been updated by collecting the multi-aligned sequences of Chordata mitochondrial genes coding for proteins and tRNAs. The genes coding for proteins are multi-aligned based on the translated sequences and both the nucleotide and amino acid multi-alignments are provided. AMmtDB data selected throug
Oxford University Press.
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24. Interchromosomal recombination is suppressed in mammalian somatic cells.
Homologous recombination occurs intrachromosomally as well as interchromosomally, both in mitotic (somatic) cells as well as meiotically in the germline. These different processes can serve very different purposes in maintaining the integrity of the organism and in enhancing diversity in the species. As shown here, comparison of the frequencies of intra- and