Splicing factor U2AF 35 kDa subunit is a
protein
Proteins are large biomolecules and macromolecules that comprise one or more long chains of amino acid residues. Proteins perform a vast array of functions within organisms, including catalysing metabolic reactions, DNA replication, respon ...
that in humans is encoded by the ''U2AF1''
gene
In biology, the word gene (from , ; "... Wilhelm Johannsen coined the word gene to describe the Mendelian units of heredity..." meaning ''generation'' or ''birth'' or ''gender'') can have several different meanings. The Mendelian gene is a b ...
.
Function
This gene belongs to the splicing factor
SR family of genes . U2AF1 is a subunit of the U2 Auxiliary Factor complex alongside a larger subunit,
U2AF2
Splicing factor U2AF 65 kDa subunit is a protein that in humans is encoded by the ''U2AF2'' gene.
Function
In eukaryotes, the introns in the transcribed pre-mRNA first have to be removed by spliceosome in order to form a mature mRNA. A spliceo ...
. U2AF1 is a non-snRNP protein required for the binding of U2 snRNP to the pre-mRNA branch site. This gene encodes a small (~35 kDa) subunit which plays a critical role in RNA splicing by recognizing and binding to AG nucleotides at the 3’ splice site to facilitate spliceosome assembly.
Alternatively spliced
Alternative splicing, or alternative RNA splicing, or differential splicing, is an alternative splicing process during gene expression that allows a single gene to code for multiple proteins. In this process, particular exons of a gene may be i ...
transcript variants encoding different
isoforms
A protein isoform, or "protein variant", is a member of a set of highly similar proteins that originate from a single gene or gene family and are the result of genetic differences. While many perform the same or similar biological roles, some iso ...
have been identified . Somatic mutations in ''U2AF1'' have been found in a range of human cancers, with a distinctive pattern of these mutations at the zinc fingers implicating a functional role under selection. In lung cancers, these mutations affect alternative splicing of several transcripts, including oncogenic ROS1 fusions.
U2af1 conditional deletion in mouse hematopoietic system leads to early lethality suggesting its important for hematopoietic stem cell maintenance and function .
Interactions
U2 small nuclear RNA auxiliary factor 1 has been shown to
interact
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with:
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ASF/SF2,
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NXF1,
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RP9,
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SMNDC1,
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U2AF2
Splicing factor U2AF 65 kDa subunit is a protein that in humans is encoded by the ''U2AF2'' gene.
Function
In eukaryotes, the introns in the transcribed pre-mRNA first have to be removed by spliceosome in order to form a mature mRNA. A spliceo ...
,
and
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ZRANB2.
References
Further reading
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External links
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{{PDB Gallery, geneid=7307