Protein: Probable ATP-dependent RNA helicase DDX46 (Q7L014)
Organism: Homo sapiens (Human)
Function: Component of the 17S U2 SnRNP complex of the spliceosome, a large ribonucleoprotein complex that removes introns from transcribed pre-mRNAs. The 17S U2 SnRNP complex (1) directly participates in early spliceosome assembly and (2) mediates recognition of the intron branch site during pre-mRNA splicing by promoting the selection of the pre-mRNA branch-site adenosine, the nucleophile for the first step of splicing. Within the 17S U2 SnRNP complex, DDX46 plays essential roles during assembly of pre-spliceosome and proofreading of the branch site
Subcellular location: Nucleus speckle. Nucleus, Cajal body. Note=Present in Cajal bodies (CBs) and nuclear speckles
Sequence: MGRESRHYRKRSASRGRSGSRSRSRSPSDKRSKRGDDRRSRSRDRDRRRERSRSRDKRRSRSRDRKRLRRSRSRERDRSRERRRSRSRDRRRSRSRSRGRRSRSSSPGNKSKKTENRSRSKEKTDGGESSKEKKKDKDDKEDEKEKDAGNFDQNKLEEEMRKRKERVEKWREEQRKKAMENIGELKKEIEEMKQGKKWSLEDDDDDEDDPAEAEKEGNEMEGEELDPLDAYMEEVKEEVKKFNMRSVKGGGGNEKKSGPTVTKVVTVVTTKKAVVDSDKKKGELMENDQDAMEYSSEEEEVDLQTALTGYQTKQRKLLEPVDHGKIEYEPFRKNFYVEVPELAKMSQEEVNVFRLEMEGITVKGKGCPKPIKSWVQCGISMKILNSLKKHGYEKPTPIQTQAIPAIMSGRDLIGIAKTGSGKTIAFLLPMFRHIMDQRSLEEGEGPIAVIMTPTRELALQITKECKKFSKTLGLRVVCVYGGTGISEQIAELKRGAEIIVCTPGRMIDMLAANSGRVTNLRRVTYVVLDEADRMFDMGFEPQVMRIVDNVRPDRQTVMFSATFPRAMEALARRILSKPIEVQVGGRSVVCSDVEQQVIVIEEEKKFLKLLELLGHYQESGSVIIFVDKQEHADGLLKDLMRASYPCMSLHGGIDQYDRDSIINDFKNGTCKLLVATSVAARGLDVKHLILVVNYSCPNHYEDYVHRAGRTGRAGNKGYAYTFITEDQARYAGDIIKALELSGTAVPPDLEKLWSDFKDQQKAEGKIIKKSSGFSGKGFKFDETEQALANERKKLQKAALGLQDSDDEDAAVDIDEQIESMFNSKKRVKDMAAPGTSSVPAPTAGNAEKLEIAKRLALRINAQKNLGIESQDVMQQATNAILRGGTILAPTVSAKTIAEQLAEKINAKLNYVPLEKQEEERQDGGQNESFKRYEEELEINDFPQTARWKVTSKEALQRISEYSEAAITIRGTYFPPGKEPKEGERKIYLAIESANELAVQKAKAEITRLIKEELIRLQNSYQPTNKGRYKVL
InterPro domains: - IPR011545: DEAD/DEAH-box helicase domain (domain) [396-568]
- IPR001650: Helicase, C-terminal domain-like (domain) [592-753]
- IPR014014: RNA helicase, DEAD-box type, Q motif (domain) [372-400]
- IPR027417: P-loop containing nucleoside triphosphate hydrolase (homologous_superfamily) [300-757]
- IPR014001: Helicase superfamily 1/2, ATP-binding domain (domain) [391-596]
- IPR056149: ATP-dependent RNA helicase PRP5/DDX46/KHDC4, KH domain (domain) [933-1012]
- IPR000629: ATP-dependent RNA helicase DEAD-box, conserved site (conserved_site) [527-535]
Interaction partners: - Splicing factor 3B subunit 1
- Splicing factor 3A subunit 3
- Splicing factor 3A subunit 2
- Splicing factor 3A subunit 1
- Splicing factor 3B subunit 5
- Splicing factor 3B subunit 2
- Splicing factor 3B subunit 3
- Small nuclear ribonucleoprotein Sm D1
- U2 small nuclear ribonucleoprotein A'
- PHD finger-like domain-containing protein 5A
Gene Ontology annotations:
Molecular Function (MF): GO:0003674 (molecular function), GO:0005488 (binding), GO:0003824 (catalytic activity), GO:0140657 (ATP-dependent activity), GO:0140640 (catalytic activity, acting on a nucleic acid), GO:0097159 (organic cyclic compound binding), GO:0004386 (helicase activity), GO:0008186 (ATP-dependent activity, acting on RNA), GO:1901363 (heterocyclic compound binding), GO:0005515 (protein binding), GO:0003676 (nucleic acid binding), GO:0140098 (catalytic activity, acting on RNA), GO:0003724 (RNA helicase activity), GO:0003723 (RNA binding)
Biological Process (BP): GO:0008150 (biological process), GO:0008152 (metabolic process), GO:0009987 (cellular process), GO:0044237 (cellular metabolic process), GO:0006807 (nitrogen compound metabolic process), GO:0071840 (cellular component organization or biogenesis), GO:0071704 (organic substance metabolic process), GO:0044238 (primary metabolic process), GO:1901360 (organic cyclic compound metabolic process), GO:0044085 (cellular component biogenesis), GO:0006139 (nucleobase-containing compound metabolic process), GO:0046483 (heterocycle metabolic process), GO:0016043 (cellular component organization), GO:0006725 (cellular aromatic compound metabolic process), GO:0034641 (cellular nitrogen compound metabolic process), GO:0043170 (macromolecule metabolic process), GO:0090304 (nucleic acid metabolic process), GO:0022613 (ribonucleoprotein complex biogenesis), GO:0043933 (protein-containing complex organization), GO:0010467 (gene expression), GO:0022607 (cellular component assembly), GO:0016070 (RNA metabolic process), GO:0022618 (ribonucleoprotein complex assembly), GO:0065003 (protein-containing complex assembly), GO:0006396 (RNA processing), GO:0071826 (ribonucleoprotein complex subunit organization), GO:0008380 (RNA splicing), GO:0000245 (spliceosomal complex assembly), GO:0006397 (mRNA processing), GO:0016071 (mRNA metabolic process), GO:0000398 (mRNA splicing, via spliceosome), GO:0000375 (RNA splicing, via transesterification reactions), GO:0000377 (RNA splicing, via transesterification reactions with bulged adenosine as nucleophile)
Cellular Component (CC): GO:0005575 (cellular component), GO:0110165 (cellular anatomical entity), GO:0016604 (nuclear body), GO:0005622 (intracellular anatomical structure), GO:0043226 (organelle), GO:0001650 (fibrillar center), GO:0031974 (membrane-enclosed lumen), GO:0005654 (nucleoplasm), GO:0043233 (organelle lumen), GO:0043229 (intracellular organelle), GO:0016607 (nuclear speck), GO:0043227 (membrane-bounded organelle), GO:0043228 (non-membrane-bounded organelle), GO:0043231 (intracellular membrane-bounded organelle), GO:0070013 (intracellular organelle lumen), GO:0043232 (intracellular non-membrane-bounded organelle), GO:0031981 (nuclear lumen), GO:0005730 (nucleolus), GO:0005634 (nucleus)