Protein: tRNA-splicing endonuclease subunit Sen54 (SEN54 homolog) (HsSEN54) (tRNA-intron endonuclease Sen54) (Q7Z6J9)
Organism: Homo sapiens (Human)
Function: Non-catalytic subunit of the tRNA-splicing endonuclease complex, a complex responsible for identification and cleavage of the splice sites in pre-tRNA. It cleaves pre-tRNA at the 5' and 3' splice sites to release the intron. The products are an intron and two tRNA half-molecules bearing 2',3' cyclic phosphate and 5'-OH termini. There are no conserved sequences at the splice sites, but the intron is invariably located at the same site in the gene, placing the splice sites an invariant distance from the constant structural features of the tRNA body. The tRNA splicing endonuclease is also involved in mRNA processing via its association with pre-mRNA 3'-end processing factors, establishing a link between pre-tRNA splicing and pre-mRNA 3'-end formation, suggesting that the endonuclease subunits function in multiple RNA-processing events.
Subcellular location: Nucleus {ECO:0000305}. Nucleus, nucleolus {ECO:0000305}. Note=May be transiently localized in the nucleolus. {ECO:0000305}.
Sequence: MEPEPEPAAVEVPAGRVLSARELFAARSRSQKLPQRSHGPKDFLPDGSAAQAERLRRCREELWQLLAEQRVERLGSLVAAEWRPEEGFVELKSPAGKFWQTMGFSEQGRQRLHPEEALYLLECGSIHLFHQDLPLSIQEAYQLLLTDHTVTFLQYQVFSHLKRLGYVVRRFQPSSVLSPYERQLNLDASVQHLEDGDGKRKRSSSSPRSINKKAKALDNSLQPKSLAASSPPPCSQPSQCPEEKPQESSPMKGPGGPFQLLGSLGPSPGPAREGVGCSWESGRAENGVTGAGKRRWNFEQISFPNMASDSRHTLLRAPAPELLPANVAGRETDAESWCQKLNQRKEKLSRREREHHAEAAQFQEDVNADPEVQRCSSWREYKELLQRRQVQRSQRRAPHLWGQPVTPLLSPGQASSPAVVLQHISVLQTTHLPDGGARLLEKSGGLEIIFDVYQADAVATFRKNNPGKPYARMCISGFDEPVPDLCSLKRLSYQSGDVPLIFALVDHGDISFYSFRDFTLPQDVGH
InterPro domains: - IPR024336: tRNA-splicing endonuclease, subunit Sen54, N-terminal (domain) [64-129]
- IPR024337: tRNA-splicing endonuclease, subunit Sen54 (family) [6-524]
Interaction partners: - tRNA-splicing endonuclease subunit Sen2
- tRNA-splicing endonuclease subunit Sen15
- tRNA-splicing endonuclease subunit Sen34
- Polyribonucleotide 5'-hydroxyl-kinase Clp1
- Probable arginine--tRNA ligase, mitochondrial
- Cleavage and polyadenylation specificity factor subunit 1
- Cleavage and polyadenylation specificity factor subunit 4
- Cleavage stimulation factor subunit 2
- Serine/threonine-protein kinase VRK1
- Target of EGR1 protein 1
Gene Ontology annotations:
Molecular Function (MF): GO:0003674 (molecular function), GO:0005488 (binding), GO:0005515 (protein binding)
Biological Process (BP): GO:0008150 (biological process), GO:0008152 (metabolic process), GO:0009987 (cellular process), GO:0044237 (cellular metabolic process), GO:0071704 (organic substance metabolic process), GO:0044238 (primary metabolic process), GO:0006807 (nitrogen compound metabolic process), GO:0006725 (cellular aromatic compound metabolic process), GO:0034641 (cellular nitrogen compound metabolic process), GO:1901360 (organic cyclic compound metabolic process), GO:0006139 (nucleobase-containing compound metabolic process), GO:0043170 (macromolecule metabolic process), GO:0046483 (heterocycle metabolic process), GO:0090304 (nucleic acid metabolic process), GO:0010467 (gene expression), GO:0016070 (RNA metabolic process), GO:0006396 (RNA processing), GO:0034470 (ncRNA processing), GO:0034660 (ncRNA metabolic process), GO:0006399 (tRNA metabolic process), GO:0008033 (tRNA processing)
Cellular Component (CC): GO:0005575 (cellular component), GO:0110165 (cellular anatomical entity), GO:0005622 (intracellular anatomical structure), GO:0043226 (organelle), GO:0031974 (membrane-enclosed lumen), GO:0005654 (nucleoplasm), GO:0043229 (intracellular organelle), GO:0043233 (organelle lumen), GO:0043227 (membrane-bounded organelle), GO:0043231 (intracellular membrane-bounded organelle), GO:0070013 (intracellular organelle lumen), GO:0031981 (nuclear lumen), GO:0005634 (nucleus)