L_SENDO
ID L_SENDO Reviewed; 2228 AA.
AC O55528; O55530;
DT 01-FEB-2005, integrated into UniProtKB/Swiss-Prot.
DT 01-JUN-1998, sequence version 1.
DT 03-AUG-2022, entry version 109.
DE RecName: Full=RNA-directed RNA polymerase L;
DE Short=Protein L;
DE AltName: Full=Large structural protein;
DE AltName: Full=Replicase;
DE AltName: Full=Transcriptase;
DE Includes:
DE RecName: Full=RNA-directed RNA polymerase;
DE EC=2.7.7.48 {ECO:0000250|UniProtKB:P28887};
DE Includes:
DE RecName: Full=GTP phosphohydrolase {ECO:0000250|UniProtKB:P03523};
DE EC=3.6.1.- {ECO:0000250|UniProtKB:P03523};
DE Includes:
DE RecName: Full=GDP polyribonucleotidyltransferase {ECO:0000305};
DE EC=2.7.7.88 {ECO:0000250|UniProtKB:P03523};
DE AltName: Full=PRNTase {ECO:0000305};
DE Includes:
DE RecName: Full=mRNA cap methyltransferase {ECO:0000305};
DE EC=2.1.1.375 {ECO:0000250|UniProtKB:P03523};
DE AltName: Full=mRNA (guanine-N(7)-)-methyltransferase {ECO:0000250|UniProtKB:P03523};
DE Short=G-N7-MTase {ECO:0000250|UniProtKB:P03523};
DE AltName: Full=mRNA (nucleoside-2'-O-)-methyltransferase {ECO:0000250|UniProtKB:P03523};
DE Short=N1-2'-O-MTase {ECO:0000250|UniProtKB:P03523};
GN Name=L;
OS Sendai virus (strain Ohita) (SeV).
OC Viruses; Riboviria; Orthornavirae; Negarnaviricota; Haploviricotina;
OC Monjiviricetes; Mononegavirales; Paramyxoviridae; Orthoparamyxovirinae;
OC Respirovirus.
OX NCBI_TaxID=302272;
OH NCBI_TaxID=10144; Cavia cutleri (Guinea pig).
OH NCBI_TaxID=36483; Cricetidae sp. (Hamster).
OH NCBI_TaxID=10090; Mus musculus (Mouse).
OH NCBI_TaxID=10116; Rattus norvegicus (Rat).
RN [1]
RP NUCLEOTIDE SEQUENCE [GENOMIC RNA].
RC STRAIN=Isolate M1, and Isolate MVC11;
RX PubMed=9400971; DOI=10.1099/0022-1317-78-12-3207;
RA Itoh M., Isegawa Y., Hotta H., Homma M.;
RT "Isolation of an avirulent mutant of Sendai virus with two amino acid
RT mutations from a highly virulent field strain through adaptation to LLC-MK2
RT cells.";
RL J. Gen. Virol. 78:3207-3215(1997).
CC -!- FUNCTION: RNA-directed RNA polymerase that catalyzes the transcription
CC of viral mRNAs, their capping and polyadenylation. The template is
CC composed of the viral RNA tightly encapsidated by the nucleoprotein
CC (N). The viral polymerase binds to the genomic RNA at the 3' leader
CC promoter, and transcribes subsequently all viral mRNAs with a
CC decreasing efficiency. The first gene is the most transcribed, and the
CC last the least transcribed. The viral phosphoprotein acts as a
CC processivity factor. Capping is concommitant with initiation of mRNA
CC transcription. Indeed, a GDP polyribonucleotidyl transferase (PRNTase)
CC adds the cap structure when the nascent RNA chain length has reached
CC few nucleotides. Ribose 2'-O methylation of viral mRNA cap precedes and
CC facilitates subsequent guanine-N-7 methylation, both activities being
CC carried by the viral polymerase. Polyadenylation of mRNAs occur by a
CC stuttering mechanism at a slipery stop site present at the end viral
CC genes. After finishing transcription of a mRNA, the polymerase can
CC resume transcription of the downstream gene.
CC {ECO:0000250|UniProtKB:P03523}.
CC -!- FUNCTION: RNA-directed RNA polymerase that catalyzes the replication of
CC viral genomic RNA. The template is composed of the viral RNA tightly
CC encapsidated by the nucleoprotein (N). The replicase mode is dependent
CC on intracellular N protein concentration. In this mode, the polymerase
CC replicates the whole viral genome without recognizing transcriptional
CC signals, and the replicated genome is not caped or polyadenylated.
CC {ECO:0000250|UniProtKB:P03523}.
CC -!- CATALYTIC ACTIVITY:
CC Reaction=a ribonucleoside 5'-triphosphate + RNA(n) = diphosphate +
CC RNA(n+1); Xref=Rhea:RHEA:21248, Rhea:RHEA-COMP:14527, Rhea:RHEA-
CC COMP:17342, ChEBI:CHEBI:33019, ChEBI:CHEBI:61557, ChEBI:CHEBI:140395;
CC EC=2.7.7.48; Evidence={ECO:0000255|PROSITE-ProRule:PRU00539};
CC -!- CATALYTIC ACTIVITY:
CC Reaction=a 5'-end (5'-triphosphoguanosine)-adenylyl-adenylyl-cytidylyl-
CC adenosine in mRNA + 2 S-adenosyl-L-methionine = a 5'-end (N(7)-methyl
CC 5'-triphosphoguanosine)-(2'-O-methyladenylyl)-adenylyl-cytidylyl-
CC adenosine in mRNA + H(+) + 2 S-adenosyl-L-homocysteine;
CC Xref=Rhea:RHEA:65376, Rhea:RHEA-COMP:16797, Rhea:RHEA-COMP:16798,
CC ChEBI:CHEBI:15378, ChEBI:CHEBI:57856, ChEBI:CHEBI:59789,
CC ChEBI:CHEBI:156483, ChEBI:CHEBI:156484; EC=2.1.1.375;
CC Evidence={ECO:0000250|UniProtKB:P03523};
CC -!- CATALYTIC ACTIVITY:
CC Reaction=a 5'-end (5'-triphosphoguanosine)-adenylyl-adenylyl-cytidylyl-
CC adenosine in mRNA + S-adenosyl-L-methionine = a 5'-end (5'-
CC triphosphoguanosine)-(2'-O-methyladenylyl)-adenylyl-cytidylyl-
CC adenosine in mRNA + H(+) + S-adenosyl-L-homocysteine;
CC Xref=Rhea:RHEA:65380, Rhea:RHEA-COMP:16797, Rhea:RHEA-COMP:16801,
CC ChEBI:CHEBI:15378, ChEBI:CHEBI:57856, ChEBI:CHEBI:59789,
CC ChEBI:CHEBI:156482, ChEBI:CHEBI:156484;
CC Evidence={ECO:0000250|UniProtKB:P03523};
CC -!- CATALYTIC ACTIVITY:
CC Reaction=a 5'-end triphospho-adenylyl-adenylyl-cytidylyl-adenosine in
CC mRNA + GDP + H(+) = a 5'-end (5'-triphosphoguanosine)-adenylyl-
CC adenylyl-cytidylyl-adenosine in mRNA + diphosphate;
CC Xref=Rhea:RHEA:65436, Rhea:RHEA-COMP:16797, Rhea:RHEA-COMP:16799,
CC ChEBI:CHEBI:15378, ChEBI:CHEBI:33019, ChEBI:CHEBI:58189,
CC ChEBI:CHEBI:156484, ChEBI:CHEBI:156503; EC=2.7.7.88;
CC Evidence={ECO:0000250|UniProtKB:P28887};
CC -!- CATALYTIC ACTIVITY:
CC Reaction=a 5'-end (5'-triphosphoguanosine)-(2'-O-methyladenylyl)-
CC adenylyl-cytidylyl-adenosine in mRNA + S-adenosyl-L-methionine = a
CC 5'-end (N(7)-methyl 5'-triphosphoguanosine)-(2'-O-methyladenylyl)-
CC adenylyl-cytidylyl-adenosine in mRNA + S-adenosyl-L-homocysteine;
CC Xref=Rhea:RHEA:65440, Rhea:RHEA-COMP:16798, Rhea:RHEA-COMP:16801,
CC ChEBI:CHEBI:57856, ChEBI:CHEBI:59789, ChEBI:CHEBI:156482,
CC ChEBI:CHEBI:156483; Evidence={ECO:0000250|UniProtKB:P03523};
CC -!- CATALYTIC ACTIVITY:
CC Reaction=GTP + H2O = GDP + H(+) + phosphate; Xref=Rhea:RHEA:19669,
CC ChEBI:CHEBI:15377, ChEBI:CHEBI:15378, ChEBI:CHEBI:37565,
CC ChEBI:CHEBI:43474, ChEBI:CHEBI:58189;
CC Evidence={ECO:0000250|UniProtKB:P28887};
CC -!- SUBUNIT: Homooligomer. Interacts with the P and C proteins. The L
CC protein complexes with P protein to form the functional polymerase. C
CC protein binding to L has an inhibitory effect (By similarity).
CC {ECO:0000250}.
CC -!- SUBCELLULAR LOCATION: Virion {ECO:0000305}. Host cytoplasm
CC {ECO:0000250}.
CC -!- DOMAIN: The N-terminal part (about 1-400) seems to be involved in
CC binding to the P protein. {ECO:0000250}.
CC -!- MISCELLANEOUS: Least abundant structural protein (approximately 50
CC copies per virion). Unstable in the absence of P protein (By
CC similarity). {ECO:0000250}.
CC -!- SIMILARITY: Belongs to the paramyxovirus L protein family.
CC {ECO:0000305}.
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DR EMBL; AB005795; BAA24392.1; -; Genomic_RNA.
DR EMBL; AB005796; BAA24401.1; -; Genomic_RNA.
DR RefSeq; NP_056879.1; NC_001552.1.
DR SMR; O55528; -.
DR PRIDE; O55528; -.
DR GeneID; 1489777; -.
DR KEGG; vg:1489777; -.
DR Proteomes; UP000006563; Genome.
DR Proteomes; UP000007311; Genome.
DR GO; GO:0030430; C:host cell cytoplasm; IEA:UniProtKB-SubCell.
DR GO; GO:0005524; F:ATP binding; IEA:UniProtKB-KW.
DR GO; GO:0003924; F:GTPase activity; IEA:RHEA.
DR GO; GO:0004482; F:mRNA (guanine-N7-)-methyltransferase activity; IEA:InterPro.
DR GO; GO:0003968; F:RNA-directed 5'-3' RNA polymerase activity; IEA:UniProtKB-KW.
DR GO; GO:0039689; P:negative stranded viral RNA replication; IDA:UniProtKB.
DR InterPro; IPR024352; L_methyltrans_paramyxo.
DR InterPro; IPR039736; L_poly_C.
DR InterPro; IPR026890; Mononeg_mRNAcap.
DR InterPro; IPR014023; Mononeg_RNA_pol_cat.
DR InterPro; IPR025786; Mononega_L_MeTrfase.
DR InterPro; IPR016269; RNA-dir_pol_paramyxovirus.
DR Pfam; PF12803; G-7-MTase; 1.
DR Pfam; PF14318; Mononeg_mRNAcap; 1.
DR Pfam; PF00946; Mononeg_RNA_pol; 1.
DR PIRSF; PIRSF000830; RNA_pol_ParamyxoV; 1.
DR TIGRFAMs; TIGR04198; paramyx_RNAcap; 1.
DR PROSITE; PS50526; RDRP_SSRNA_NEG_NONSEG; 1.
DR PROSITE; PS51590; SAM_MT_MNV_L; 1.
PE 3: Inferred from homology;
KW ATP-binding; Host cytoplasm; Hydrolase; Methyltransferase; mRNA capping;
KW mRNA processing; Multifunctional enzyme; Nucleotide-binding;
KW Nucleotidyltransferase; Reference proteome; RNA-directed RNA polymerase;
KW S-adenosyl-L-methionine; Transferase; Viral RNA replication; Virion.
FT CHAIN 1..2228
FT /note="RNA-directed RNA polymerase L"
FT /id="PRO_0000142739"
FT DOMAIN 656..840
FT /note="RdRp catalytic"
FT /evidence="ECO:0000255|PROSITE-ProRule:PRU00539"
FT DOMAIN 1771..1978
FT /note="Mononegavirus-type SAM-dependent 2'-O-MTase"
FT /evidence="ECO:0000255|PROSITE-ProRule:PRU00923"
FT REGION 1..174
FT /note="Oligomerization domain"
FT /evidence="ECO:0000250"
FT REGION 607..633
FT /note="Disordered"
FT /evidence="ECO:0000256|SAM:MobiDB-lite"
FT REGION 1756..2228
FT /note="Involved in mRNA cap methylation"
FT /evidence="ECO:0000250"
FT COMPBIAS 613..633
FT /note="Basic and acidic residues"
FT /evidence="ECO:0000256|SAM:MobiDB-lite"
FT BINDING 1801..1810
FT /ligand="ATP"
FT /ligand_id="ChEBI:CHEBI:30616"
FT /evidence="ECO:0000255"
FT VARIANT 2050
FT /note="E -> A (in avirulent isolate MVC11)"
SQ SEQUENCE 2228 AA; 253061 MW; 9BDAC6F266B13B1F CRC64;
MDGQESTQNP SDILYPECHL NSPIVRGKIA QLHVLLDVNQ PYILKDDSII NITKHKIRNG
GLSLRQIKIR SLGKALQRTI KDLDRYTFEP YPTYSQELLR LDIPEICDKI RSVFAVSDRL
TKELSNGFQD LWLNIFKQLG NIEGREGYDP LQDISTIPEI TERYSRNKWY RPFLTWFSIK
YDMRWMQKTR PGGPLDTSNS HNLLECKSYT LVTYGDLVMI LNKSTLTGYI LTPELVLMYC
DVVEGRWNMS AAGQLDKRST GITSKGEELW ELVDSLFSSL GEEIYNVIAL LEPLSLALIQ
LSDPVIPLRG AFMRHVLTEL QTVLTSKDVY TDPEADAIVE SLLAIFHGTS IDEKAEIFSF
FRTFGHPSLE AVTAADKVRA HMYAQKAIKL KTLHECHAVF CTIIINGYRE RHGGQWPPCD
FPDHVCLELR NAQGSNTAIS YECAVDNYTS FIGFKFRKFI EPQLDEDLTI YMKDKALSPR
KEAWDSVYPD SNLYYKVPES EETRRLIEVF INDENFNPED IIDYVESGDW LKDEKFNISY
SLKEKEIKQE GRLFAKMTYK MRAVQVLAET LLAKGIGELF SENGMVKGEI DLLKRLTTLS
VSGVPRTDSV YNNPRSSEKR NESMKKRNSK GYWDEKKRSR HEFKATDSST DGYETLSCFL
TTDLKKYCLN WRFESTALFG QRCNEIFGFK TFFNWMHPVL EKCTIYVGDP YCPVADRMHR
QLQDHADSGI FIHNPRGGIE GYCQKLWTLI SISAIHLAAV RVGVRVSAMV QGDNQAIAVT
SRVPVAQTYK QKKNHVYEEI TRYFGALRHV MFDIGHELKL NETIISSKMF VYSKRIYYDG
KILPQCLKAL TRCVFWSETL VDENRSACSN ISTSIAKAIE NGYSPILGYC IALYKTCQQV
CISLGMTINP TISPTVRDQY FKGKNWLRCA VLIPANVGGF NYMSTSRCFV RNIGDPAVAA
LADLKRFIRA DLLDKQVLYR VMNQEPGDSS FLDWASDPYS CNLPHSQSIT TIIKNITARS
VLQESPNPLL SGLFTETSGE EDLNLASFLM DRKVILPRVA HEILSNSLTG VREAIAGMLD
TTKSLVRASV KRGGLSYGIL RRLVNYDLLQ YETLTRTLRK PVKDNIEYEY MCSVELAVGL
RQKMWIHLTY GRPIHGLETP DPLELLRGTF IEGSEVCKLC RSEGADPIYT WFYLPDNIDL
DTLTNGSPAI RIPYFGSATD ERSEAQLGYV RNLSKPAKAA IRIAMVYTWA YGTDEISWME
AALIAQTRAN LSLENLKLLT PVSTSTNLSH RLKDTATQMK FSSATLVRAS RFITISNDNM
ALKEAGESKD TNLVYQQIML TGLSLFEFNM RYKKGSLEKP LILHLHLNNG CCIMESPQEA
NIPPRSTLDL EITQENNKLI YDPDPLRDVD LELFSKVRDV VHTVDMTYWS DDEVIRATSI
CTAMTIADTM SQLDRDNLKE MIALVNDDDV NSLITEFMVI DVPLFCSTFG GILVNQFAYS
LYGLNIRGRE EIWGHVVRIL KDTSHAVLKV LSNALSHPKI FKRFWNAGVV EPVYGPNLSN
QDKTLLALSV CEYSVDLFMH DWQGGVPLEV FICDNDPDVA DMRRSSFLAR HLAYLCSLAE
ISRDGPRLES MNSLERLETL KSYLELTFLD DPVLRYSQLT GLVIKVFPST LTYIRKSSIK
VLRTRGIGVP EVLEDWDPEA DNALLDGIAA EIQQNIPLGH QTRAPFWGLR VSKSQVLRLR
GYEEITRGEV GRSGVGLTLP FDGRYLSHQL RLFGVNSTSC LKALELTYLL SPLVDKDKDR
LFLGEGAGAM LSCYDATLGP CINYYNSGVY SCDVNGQREL NIYPAEVALV GKKLNNVTSL
GQRVKVLFNG NPGSTWIGND ECEALIWNEL QNNSIGLVHC DMEGGDHKDD QVVLHEHYSV
IRIAYLVGDR DVVLISKIAP RLGTDWTRQL SLYLRYWDEV NLVVLKTSNP ASTEMYLLSR
HPKSDIIEDS KTVLASLHPL SKEDSIKIEK WILIEKAKAH EWVTRELREG SSSSGMLRPY
HQALQTFGFE PNLYKLSRDF LSTMNIADTH NCMTAFNRVL KDTIFEWARI TESDKRLKLT
GKYDLYPVRD SGKLKTISRR LVLSWVSLSM STRLVTGSFP DQKFEARLQL GIVSLSSREI
RNLRVITKTI LDRFENTIHS ITYRFLTKEV KILMKILGAV KMFGARQNEY TTVVDDGSLD
DIEPYDSL
