Summary
[Wormbase] cbp-1 encodes a homolog of the mammalian transcriptional cofactors CBP (OMIM:600140) and p300 (E1A-BINDING PROTEIN, 300-KD; OMIM:602700) that have been shown to possess histone acetyltransferase activity, and which, when mutated, lead to Rubinstein-Taybi syndrome (OMIM:180849) and colorectal cancer (OMIM:114500); at least one splicing form of CBP-1 exhibits histone acetyltransferase (HAT) activity in vitro and has a glutamine/asparagine-rich domain; CBP-1 is required during embryogenesis for differentiation of all non-neuronal somatic cell types; CBP-1 is expressed very early in embryogenesis, suggesting that it may interact with maternally provided transcription factors, such as SKN-1, to specific developmental fates
.
Wormbase predicts 3 models, but Caenorhabditis elegans cDNA sequences in GenBank, dbEST, Trace and SRA, filtered against clone rearrangements, coaligned on the genome and clustered in a minimal non-redundant way by the manually supervised AceView program, support at least 5 spliced variants.
AceView synopsis, each blue text links to tables and details
Expression: According to AceView, this gene is
expressed at very high level, 4.5 times the average gene in this release, at all stages of development [Kohara cDNAs]. The expression profile for the gene, derived from the proportion of animals at each stage in each Kohara library is: embryos 18%, L1 or L2 larvae 25%, L3 to adult (including dauer) 57%. See the in situ hybridization pattern in
Kohara NextDB. The
sequence of this gene is defined by
33 cDNA clones and 26 elements defined by RNA-seq, some from embryo (seen 7 times), mixed (7), l2 (6), l1 (3), l4 (2), dauer (once). We annotate
structural defects or features in 7 cDNA clones.
Alternative mRNA variants and regulation: The gene contains
15 distinct gt-ag introns. Transcription produces at least
6 different mRNAs, 5 alternatively spliced variants and 1 unspliced form. cbp-1.a is transpliced to SL1. There are 2 probable
alternative promotors, 2 non overlapping alternative last exons and 10 validated
alternative polyadenylation sites (see the
diagram). The mRNAs appear to differ by truncation of the 5' end, truncation of the 3' end, presence or absence of 2
cassette exons, overlapping exons with different boundaries.
Function: There are
11 articles specifically referring to this gene in PubMed. In addition we point
below to 15 abstracts. This essential gene is associated to a
phenotype (cell determination and differentiation, Defect in cell division, Embryonic Lethal (zygotic), Sterile adult, unhealthy). Functionally, the gene has been proposed to participate in
processes (regulation of transcription, regulation of transcription, DNA-dependent). Proteins are expected to have molecular
functions (histone acetyltransferase activity, protein binding activity, transcription co-activator activity, transcription cofactor activity, zinc ion binding activity) and to
localize in nucleus. These proteins appear to
interact with other proteins (GEI-21, HIF-1). The gene
interacts with 5 other genes (HDA-1, LET-60, LIN-1, PRY-1, SUR-6).
Protein coding potential: The 5 spliced and the unspliced mRNAs putatively encode
good proteins, altogether
6 different isoforms (2 complete, 2 COOH complete, 2 partial), some containing
domains Bromodomain, Protein of unknown function DUF902, CREBbp, Transcriptional coactivation, Coactivator CBP, KIX, Zinc finger, TAZ-type, Zinc finger, ZZ-type [Pfam], a coiled coil stretch
[Psort2].
Please quote:
AceView: a comprehensive cDNA-supported gene and transcripts annotation, Genome Biology 2006, 7(Suppl 1):S12.
Map on chromosome III, links to other databases and other names
Map: This essential gene cbp-1 maps on chomosome III at position +0.83 (interpolated). In AceView, it covers
8.31 kb, from 9766415 to 9774724 (WS190), on the direct strand.
Links to: WormBase,
NextDB,
RNAiDB.
Other names: The gene is also known in Wormgenes/AceView by its positional name 3K863, in Wormbase by its cosmid.number name R10E11.1, in NextDB, the Nematode expression pattern database, as CEYK1421.
Closest AceView homologs in other species
?
The closest human genes, according to BlastP, are the AceView genes
EP300 (e=0.0),
CREBBP (e=0.0).
The closest mouse genes, according to BlastP, are the AceView genes
Ep300 (e=0.0),
Crebbp (e=0.0).
The closest A.thaliana genes, according to BlastP, are the AceView genes
HAC1 (e=4 10
-63),
ATHPCAT4\/HAC5 (e=2 10
-62),
HAC12 (e=2 10
-62)
Alternative mRNAs are shown aligned from 5' to 3' on a virtual genome where introns have been shrunk to a minimal length. Exon size is proportional to length, intron height reflects the number of cDNAs supporting each intron, the small numbers show the support of the introns in deep sequencing (with details in mouse-over) . Introns of the same color are identical, of different colors are different. 'Good proteins' are pink, partial or not-good proteins are yellow, uORFs are green. 5' cap or3' poly A flags show completeness of the transcript.
Read more...
Mouse over the ending of each transcript gives tissues from which the supporting cDNAs were extracted. Details on tissue of origin for each intron and exon is available from the
intron and exons table.
Click on any transcript to open the specific mRNA page, to see the exact cDNA clone support and eventual SNPs and to get details on tissues, sequences, mRNA and protein annotations. Proteins supported by a single continuous cDNA sequence lead to underlining the name/ending of the variant. Names not underlined result from cDNA concatenation in the coding region and should be experimentally checked.
Introns are depicted by broken lines; the height of the top of each intron reflects the relative number of clones supporting this intron.
]^[ A pink broken line denotes an intron with standard boundaries (gt-ag or gc-ag) that is exactly supported (i.e. a cDNA sequence exactly matches the genome over 16 bp, 8 on both sides of the intron).
] ^ ] A blue broken line denotes non-standard introns, exactly supported, but with non-standard at-ac or any other boundaries.
]-[ Pink and
] - ] blue straight lines represent 'fuzzy' introns of the standard and non-standard types respectively, those introns do not follow the 16 bp rule. Black straight lines ]-[denote gaps in the alignments.
Exons: Wide filled pink areas represent putative protein coding regions, narrow empty pink boxes represent the 5'UTR (on the left) and 3' UTR (on the right). Flags identify validated endings: cap site on the 5' side, polyadenylation site on the 3' side. Filled flags correspond to frequent events while empty flags have lesser supporting cDNAs (yet all are validated); at the 3' side, black flags are associated to the main AATAAA signal,
blue flags to any single letter variant of the main . More explanations are given in the
gene help file
