WD repeat-containing protein 61 (Meiotic recombination REC14 protein homolog) (SKI8 homolog) (Ski8) [Cleaved into: WD repeat-containing protein 61, N-terminally processed]
1_MTNQY 6_ GILFK 11_ QEQAH 16_ DDAIW 21_ SVAWG 26_ TNKKE 31_ NSETV 36_ VTGSL 41_ DDLVK 46_ VWKWR 51_ DERLD 56_ LQWSL 61_ EGHQL 66_ GVVSV 71_ DISHT 76_ LPIAA 81_ SSSLD 86_ AHIRL 91_ WDLEN 96_ GKQIK 101_ SIDAG 106_ PVDAW 111_ TLAFS 116_ PDSQY 121_ LATGT 126_ HVGKV 131_ NIFGV 136_ ESGKK 141_ EYSLD 146_ TRGKF 151_ ILSIA 156_ YSPDG 161_ KYLAS 166_ GAIDG 171_ IINIF 176_ DIATG 181_ KLLHT 186_ LEGHA 191_ MPIRS 196_ LTFSP 201_ DSQLL 206_ VTASD 211_ DGYIK 216_ IYDVQ 221_ HANLA 226_ GTLSG 231_ HASWV 236_ LNVAF 241_ CPDDT 246_ HFVSS 251_ SSDKS 256_ VKVWD 261_ VGTRT 266_ CVHTF 271_ FDHQD 276_ QVWGV 281_ KYNGN 286_ GSKIV 291_ SVGDD 296_QEIHI
1: Component of the PAF1 complex (PAF1C) which has multiple functions during transcription by RNA polymerase II and is implicated in regulation of development and maintenance of embryonic stem cell pluripotency (PubMed:16307923, PubMed:19952111, PubMed:20178742). PAF1C associates with RNA polymerase II through interaction with POLR2A CTD non-phosphorylated and 'Ser-2'- and 'Ser-5'-phosphorylated forms and is involved in transcriptional elongation, acting both independently and synergistically with TCEA1 and in cooperation with the DSIF complex and HTATSF1 (PubMed:16307923, PubMed:19952111, PubMed:20178742). PAF1C is required for transcription of Hox and Wnt target genes (PubMed:16307923, PubMed:19952111, PubMed:20178742). PAF1C is involved in hematopoiesis and stimulates transcriptional activity of KMT2A/MLL1; it promotes leukemogenesis through association with KMT2A/MLL1-rearranged oncoproteins, such as KMT2A/MLL1-MLLT3/AF9 and KMT2A/MLL1-MLLT1/ENL (PubMed:16307923, PubMed:19952111, PubMed:20178742). PAF1C is involved in histone modifications such as ubiquitination of histone H2B and methylation on histone H3 'Lys-4' (H3K4me3) (PubMed:16307923, PubMed:19952111, PubMed:20178742). PAF1C recruits the RNF20/40 E3 ubiquitin-protein ligase complex and the E2 enzyme UBE2A or UBE2B to chromatin which mediate monoubiquitination of 'Lys-120' of histone H2B (H2BK120ub1); UB2A/B-mediated H2B ubiquitination is proposed to be coupled to transcription (PubMed:16307923, PubMed:19952111, PubMed:20178742). PAF1C is involved in mRNA 3' end formation probably through association with cleavage and poly(A) factors (PubMed:16307923, PubMed:19952111, PubMed:20178742). In case of infection by influenza A strain H3N2, PAF1C associates with viral NS1 protein, thereby regulating gene transcription (PubMed:16307923, PubMed:19952111, PubMed:20178742). Required for mono- and trimethylation on histone H3 'Lys-4' (H3K4me3), dimethylation on histone H3 'Lys-79' (H3K4me3). Required for Hox gene transcription (PubMed:16307923, PubMed:19952111, PubMed:20178742). Also acts as a component of the SKI complex, a multiprotein complex that assists the RNA-degrading exosome during the mRNA decay and quality-control pathways (PubMed:16024656, PubMed:32006463, PubMed:35120588). The SKI complex catalyzes mRNA extraction from 80S ribosomal complexes in the 3'-5' direction and channels mRNA to the cytosolic exosome for degradation (PubMed:32006463, PubMed:35120588). SKI-mediated extraction of mRNA from stalled ribosomes allow binding of the Pelota-HBS1L complex and subsequent ribosome disassembly by ABCE1 for ribosome recycling (PubMed:32006463)