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SNRPA | small nuclear ribonucleoprotein polypeptide A; Binds stem loop II of U1 snRNA. It is the first snRNP to interact with pre-mRNA. This interaction is required for the subsequent binding of U2 snRNP and the U4/U6/U5 tri-snRNP. In a snRNP-free form (SF-A) may be involved in coupled pre-mRNA splicing and polyadenylation process. Binds preferentially to the 5’-UGCAC-3’ motif in vitro (282 aa) | |||
SNRPB2 | small nuclear ribonucleoprotein polypeptide B; Involved in pre-mRNA splicing. This protein is associated with snRNP U2. It binds stem loop IV of U2 snRNA only in presence of the U2A’ protein (225 aa) | |||
RALY | RNA binding protein, autoantigenic (hnRNP-associated with lethal yellow homolog (mouse)); Probable-RNA binding protein. Could be a heterogeneous nuclear ribonucleoprotein (hnRNP). May be involved in pre-mRNA splicing (By similarity) (306 aa) | |||
ZCCHC11 | zinc finger, CCHC domain containing 11; Uridylyltransferase that acts as a suppressor of microRNA (miRNA) biogenesis by specifically mediating the terminal uridylation of some miRNAs. Catalyzes the 3’ uridylation of precursor let-7 (pre-let-7), a miRNA precursor. Uridylated pre- let-7 miRNAs fail to be processed by Dicer and undergo degradation. Degradation of pre-let-7 contributes to the maintenance of embryonic stem (ES) cells and is required for ES cells to maintain pluripotency. Does not bind RNA by itself, recruited to pre-let-7 miRNAs via its interaction with LIN28A and LIN28B. A [...] (1645 aa) | |||
SNRPF | small nuclear ribonucleoprotein polypeptide F; Appears to function in the U7 snRNP complex that is involved in histone 3’-end processing. Associated with snRNP U1, U2, U4/U6 and U5 (86 aa) | |||
EIF4A3 | eukaryotic translation initiation factor 4A3; ATP-dependent RNA helicase. Component of a splicing- dependent multiprotein exon junction complex (EJC) deposited at splice junction on mRNAs. The EJC is a dynamic structure consisting of a few core proteins and several more peripheral nuclear and cytoplasmic associated factors that join the complex only transiently either during EJC assembly or during subsequent mRNA metabolism. Core components of the EJC, that remains bound to spliced mRNAs throughout all stages of mRNA metabolism, functions to mark the position of the exon-exon junction [...] (411 aa) | |||
SNRPG | small nuclear ribonucleoprotein polypeptide G; Appears to function in the U7 snRNP complex that is involved in histone 3’-end processing. Associated with snRNP U1, U2, U4/U6 and U5 (76 aa) | |||
NHP2 | NHP2 ribonucleoprotein homolog (yeast); Required for ribosome biogenesis and telomere maintenance. Part of the H/ACA small nucleolar ribonucleoprotein (H/ACA snoRNP) complex, which catalyzes pseudouridylation of rRNA. This involves the isomerization of uridine such that the ribose is subsequently attached to C5, instead of the normal N1. Each rRNA can contain up to 100 pseudouridine ("psi") residues, which may serve to stabilize the conformation of rRNAs. May also be required for correct processing or intranuclear trafficking of TERC, the RNA component of the telomerase reverse transcr [...] (153 aa) | |||
MKI67IP | MKI67 (FHA domain) interacting nucleolar phosphoprotein (293 aa) | |||
PHAX | phosphorylated adaptor for RNA export; A phosphoprotein adapter involved in the XPO1-mediated U snRNA export from the nucleus. Bridge components required for U snRNA export, the cap binding complex (CBC)-bound snRNA on the one hand and the GTPase Ran in its active GTP-bound form together with the export receptor XPO1 on the other. Its phosphorylation in the nucleus is required for U snRNA export complex assembly and export, while its dephosphorylation in the cytoplasm causes export complex disassembly. It is recycled back to the nucleus via the importin alpha/beta heterodimeric import [...] (394 aa) | |||
USP36 | ubiquitin specific peptidase 36; May be required for maintaining multiple types of adult stem cells. May function as a transcriptional repressor by continually deubiquiting histone H2B at the promoters of genes critical for cellular differentiation, thereby preventing histone H3 ’Lys-4’ trimethylation (H3K4) (By similarity) (1123 aa) | |||
LARP7 | La ribonucleoprotein domain family, member 7; Negative transcriptional regulator of polymerase II genes, acting by means of the 7SK RNP system. Within the 7SK RNP complex, the positive transcription elongation factor b (P-TEFb) is sequestered in an inactive form, preventing RNA polymerase II phosphorylation and subsequent transcriptional elongation (582 aa) | |||
NCBP2 | nuclear cap binding protein subunit 2, 20kDa; Component of the cap-binding complex (CBC), which binds co-transcriptionally to the 5’ cap of pre-mRNAs and is involved in various processes such as pre-mRNA splicing, translation regulation, nonsense-mediated mRNA decay, RNA-mediated gene silencing (RNAi) by microRNAs (miRNAs) and mRNA export. The CBC complex is involved in mRNA export from the nucleus via its interaction with ALYREF/THOC4/ALY, leading to the recruitment of the mRNA export machinery to the 5’ end of mRNA and to mRNA export in a 5’ to 3’ direction through the nuclear pore. [...] (156 aa) | |||
NOP10 | NOP10 ribonucleoprotein homolog (yeast); Required for ribosome biogenesis and telomere maintenance. Part of the H/ACA small nucleolar ribonucleoprotein (H/ACA snoRNP) complex, which catalyzes pseudouridylation of rRNA. This involves the isomerization of uridine such that the ribose is subsequently attached to C5, instead of the normal N1. Each rRNA can contain up to 100 pseudouridine ("psi") residues, which may serve to stabilize the conformation of rRNAs. May also be required for correct processing or intranuclear trafficking of TERC, the RNA component of the telomerase reverse transc [...] (64 aa) | |||
PURA | purine-rich element binding protein A; This is a probable transcription activator that specifically binds the purine-rich single strand of the PUR element located upstream of the MYC gene. May play a role in the initiation of DNA replication and in recombination (322 aa) | |||
LIN28B | lin-28 homolog B (C. elegans); Acts as a suppressor of microRNA (miRNA) biogenesis by specifically binding the precursor let-7 (pre-let-7), a miRNA precursor. Acts by binding pre-let-7 and recruiting ZCCHC11/TUT4 uridylyltransferase, leading to the terminal uridylation of pre- let-7. Uridylated pre-let-7 miRNAs fail to be processed by Dicer and undergo degradation. Specifically recognizes the 5’-GGAG-3’ motif in the terminal loop of pre-let-7. Also recognizes and binds non pre-let-7 pre-miRNAs that contain the 5’-GGAG-3’ motif in the terminal loop, leading to their terminal uridylation [...] (250 aa) | |||
UBC | ubiquitin C (685 aa) | |||
MAX | MYC associated factor X; Transcription regulator. Forms a sequence-specific DNA- binding protein complex with MYC or MAD which recognizes the core sequence 5’-CAC[GA]TG-3’. The MYC-MAX complex is a transcriptional activator, whereas the MAD-MAX complex is a repressor. May repress transcription via the recruitment of a chromatin remodeling complex containing H3 ’Lys-9’ histone methyltransferase activity (160 aa) | |||
TRUB2 | TruB pseudouridine (psi) synthase homolog 2 (E. coli); May be responsible for synthesis of pseudouridine from uracil in transfer RNAs (By similarity) (331 aa) | |||
NCBP1 | nuclear cap binding protein subunit 1, 80kDa; Component of the cap-binding complex (CBC), which binds cotranscriptionally to the 5’-cap of pre-mRNAs and is involved in various processes such as pre-mRNA splicing, translation regulation, nonsense-mediated mRNA decay, RNA-mediated gene silencing (RNAi) by microRNAs (miRNAs) and mRNA export. The CBC complex is involved in mRNA export from the nucleus via its interaction with ALYREF/THOC4/ALY, leading to the recruitment of the mRNA export machinery to the 5’-end of mRNA and to mRNA export in a 5’ to 3’ direction through the nuclear pore. T [...] (790 aa) | |||
MYC | v-myc myelocytomatosis viral oncogene homolog (avian); Participates in the regulation of gene transcription. Binds DNA in a non-specific manner, yet also specifically recognizes the core sequence 5’-CAC[GA]TG-3’. Seems to activate the transcription of growth-related genes (454 aa) | |||
ELAVL2 | ELAV (embryonic lethal, abnormal vision, Drosophila)-like 2 (Hu antigen B); Binds RNA. Seems to recognize a GAAA motif. Can bind to its own 3’-UTR, the FOS 3’-UTR and the ID 3’-UTR (359 aa) | |||
ZCCHC3 | zinc finger, CCHC domain containing 3 (404 aa) | |||
TRIM71 | tripartite motif containing 71, E3 ubiquitin protein ligase; E3 ubiquitin-protein ligase that cooperates with the microRNAs (miRNAs) machinery and promotes embryonic stem cells proliferation and maintenance. Binds to miRNAs and associates with AGO2, participating to post-transcriptional repression of transcripts such as CDKN1A. Facilitates the G1-S transition to promote rapid embryonic stem cell self-renewal by repressing CDKN1A expression. Required to maintain proliferation and prevent premature differentiation of neural progenitor cells during early neural development- positively reg [...] (868 aa) | |||
PURB | purine-rich element binding protein B; Has capacity to bind repeated elements in single- stranded DNA such as the purine-rich single strand of the PUR element located upstream of the MYC gene. Plays a role in the control of vascular smooth muscle (VSM) alpha-actin gene transcription as repressor in myoblasts and fibroblasts. Participates in transcriptional and translational regulation of alpha-MHC expression in cardiac myocytes by binding to the purine- rich negative regulatory (PNR) element. Modulates constitutive liver galectin-3 gene transcription by binding to its promoter. May pla [...] (312 aa) | |||
LARP4 | La ribonucleoprotein domain family, member 4; Plays a role in the regulation of cell morphology and cytoskeletal organization (724 aa) |