Small nuclear ribonucleoprotein-associated proteins B and B' is a protein that in humans is encoded by the SNRPB gene. [5] [6]
Small nuclear ribonucleoprotein-associated proteins B and B' is a protein that in humans is encoded by the SNRPB gene. [5] [6]
The protein encoded by this gene is one of several nuclear proteins that are found in common among U1, U2, U4/U6, and U5 small ribonucleoprotein particles (snRNPs). These snRNPs are involved in pre-mRNA splicing, and the encoded protein may also play a role in pre-mRNA splicing or snRNP structure. Autoantibodies from patients with systemic lupus erythematosus frequently recognize epitopes on the encoded protein. Two transcript variants encoding different isoforms (B and B') have been found for this gene. [6]
SNRPB has been shown to interact with DDX20 [7] and Coilin. [8]
snRNPs, or small nuclear ribonucleoproteins, are RNA-protein complexes that combine with unmodified pre-mRNA and various other proteins to form a spliceosome, a large RNA-protein molecular complex upon which splicing of pre-mRNA occurs. The action of snRNPs is essential to the removal of introns from pre-mRNA, a critical aspect of post-transcriptional modification of RNA, occurring only in the nucleus of eukaryotic cells. Additionally, U7 snRNP is not involved in splicing at all, as U7 snRNP is responsible for processing the 3′ stem-loop of histone pre-mRNA.
Small nuclear RNA (snRNA) is a class of small RNA molecules that are found within the splicing speckles and Cajal bodies of the cell nucleus in eukaryotic cells. The length of an average snRNA is approximately 150 nucleotides. They are transcribed by either RNA polymerase II or RNA polymerase III. Their primary function is in the processing of pre-messenger RNA (hnRNA) in the nucleus. They have also been shown to aid in the regulation of transcription factors or RNA polymerase II, and maintaining the telomeres.
Gideon Dreyfuss is an American biochemist, the Isaac Norris Professor of Biochemistry and Biophysics at the University of Pennsylvania School of Medicine, and an investigator of the Howard Hughes Medical Institute. He was elected to the National Academy of Sciences in 2012.
The U4 small nuclear Ribo-Nucleic Acid is a non-coding RNA component of the major or U2-dependent spliceosome – a eukaryotic molecular machine involved in the splicing of pre-messenger RNA (pre-mRNA). It forms a duplex with U6, and with each splicing round, it is displaced from the U6 snRNA in an ATP-dependent manner, allowing U6 to re-fold and create the active site for splicing catalysis. A recycling process involving protein Brr2 releases U4 from U6, while protein Prp24 re-anneals U4 and U6. The crystal structure of a 5′ stem-loop of U4 in complex with a binding protein has been solved.
Survival of motor neuron or survival motor neuron (SMN) is a protein that in humans is encoded by the SMN1 and SMN2 genes.
rRNA 2'-O-methyltransferase fibrillarin is an enzyme that in humans is encoded by the FBL gene.
Small nuclear ribonucleoprotein Sm D1 is a protein that in humans is encoded by the SNRPD1 gene.
Small nuclear ribonucleoprotein-associated protein N is a protein that in humans is encoded by the SNRPN gene.
Small nuclear ribonucleoprotein Sm D2 is a protein that in humans is encoded by the SNRPD2 gene. It belongs to the small nuclear ribonucleoprotein core protein family, and is required for pre-mRNA splicing and small nuclear ribonucleoprotein biogenesis. Alternative splicing occurs at this locus and two transcript variants encoding the same protein have been identified.
Small nuclear ribonucleoprotein E is a protein that in humans is encoded by the SNRPE gene.
Small nuclear ribonucleoprotein Sm D3 is a protein that in humans is encoded by the SNRPD3 gene.
Gem-associated protein 2 (GEMIN2), also called survival of motor neuron protein-interacting protein 1 (SIP1), is a protein that in humans is encoded by the GEMIN2 gene.
Probable ATP-dependent RNA helicase DDX20, also known as DEAD-box helicase 20 and gem-associated protein 3 (GEMIN3), is an enzyme that in humans is encoded by the DDX20 gene.
Small nuclear ribonucleoprotein F is a protein that in humans is encoded by the SNRPF gene.
U2 small nuclear ribonucleoprotein B is a protein that in humans is encoded by the SNRPB2 gene.
Small nuclear ribonucleoprotein G is a protein that in humans is encoded by the SNRPG gene.
H/ACA ribonucleoprotein complex subunit 1 is a protein that in humans is encoded by the GAR1 gene.
U1 small nuclear ribonucleoprotein C is a protein that in humans is encoded by the SNRPC gene.
Gem-associated protein 4 is a protein that in humans is encoded by the GEMIN4 gene.
Gem-associated protein 5 is a protein that in humans is encoded by the GEMIN5 gene.
PDB gallery | |
|---|---|
|
 | This article on a gene on human chromosome 20 is a stub. You can help Wikipedia by expanding it. |
