MVP_PVYHU
ID MVP_PVYHU Reviewed; 986 AA.
AC P0CK06;
DT 31-MAY-2011, integrated into UniProtKB/Swiss-Prot.
DT 31-OCT-2012, sequence version 2.
DT 03-AUG-2022, entry version 31.
DE RecName: Full=P3N-PIPO polyprotein;
DE Contains:
DE RecName: Full=P1 proteinase;
DE EC=3.4.-.-;
DE AltName: Full=N-terminal protein;
DE Contains:
DE RecName: Full=Helper component proteinase;
DE Short=HC-pro;
DE EC=3.4.22.45;
DE Contains:
DE RecName: Full=Movement protein P3N-PIPO;
DE AltName: Full=Pretty interesting potyviridae ORF;
DE Short=PIPO;
OS Potato virus Y (strain Hungarian) (PVY).
OC Viruses; Riboviria; Orthornavirae; Pisuviricota; Stelpaviricetes;
OC Patatavirales; Potyviridae; Potyvirus.
OX NCBI_TaxID=31739;
OH NCBI_TaxID=4071; Capsicum (peppers).
OH NCBI_TaxID=4085; Nicotiana.
OH NCBI_TaxID=4081; Solanum lycopersicum (Tomato) (Lycopersicon esculentum).
OH NCBI_TaxID=4113; Solanum tuberosum (Potato).
RN [1]
RP NUCLEOTIDE SEQUENCE [GENOMIC RNA].
RX PubMed=8428653; DOI=10.1016/0378-1119(93)90118-m;
RA Thole V., Dalmay T., Burgyan J., Balazs E.;
RT "Cloning and sequencing of potato virus Y (Hungarian isolate) genomic
RT RNA.";
RL Gene 123:149-156(1993).
CC -!- FUNCTION: [Helper component proteinase]: Required for aphid
CC transmission and also has proteolytic activity. Only cleaves a Gly-Gly
CC dipeptide at its own C-terminus. Interacts with virions and aphid
CC stylets. Acts as a suppressor of RNA-mediated gene silencing, also
CC known as post-transcriptional gene silencing (PTGS), a mechanism of
CC plant viral defense that limits the accumulation of viral RNAs. May
CC have RNA-binding activity (By similarity). {ECO:0000250}.
CC -!- FUNCTION: [Movement protein P3N-PIPO]: Allows efficient cell to cell
CC propagation, by bypassing the host cell wall barrier. Transports viral
CC genome to neighboring plant cells directly through plasmosdesmata,
CC without any budding (By similarity). {ECO:0000250}.
CC -!- CATALYTIC ACTIVITY:
CC Reaction=Hydrolyzes a Gly-|-Gly bond at its own C-terminus, commonly in
CC the sequence -Tyr-Xaa-Val-Gly-|-Gly, in the processing of the
CC potyviral polyprotein.; EC=3.4.22.45;
CC -!- SUBUNIT: Interacts (via PIPO domain) with host PCaP1 protein; this
CC interaction may help to anchor the movement complex to the plasma
CC membrane from which the complex could move to the plasmodesmata.
CC {ECO:0000250}.
CC -!- SUBCELLULAR LOCATION: Host cell junction, host plasmodesma
CC {ECO:0000250}.
CC -!- ALTERNATIVE PRODUCTS:
CC Event=Ribosomal frameshifting; Named isoforms=2;
CC Name=P3N-PIPO polyprotein;
CC IsoId=P0CK06-1; Sequence=Displayed;
CC Name=Genome polyprotein;
CC IsoId=Q02963-1; Sequence=External;
CC -!- DOMAIN: The N-terminus of helper component proteinase is involved in
CC interaction with stylets. The central part is involved in interaction
CC with virions and the C-terminus is involved in cell-to cell movement of
CC the virus (By similarity). {ECO:0000250}.
CC -!- PTM: Potyviral RNA is expressed as two polyproteins which undergo post-
CC translational proteolytic processing. Genome polyprotein is processed
CC by NIa-pro, P1 and HC-pro proteinases resulting in the production of at
CC least ten individual proteins. P3N-PIPO is cleaved by P1 and HC-pro
CC proteinases resulting in the production of three individual proteins.
CC The P1 proteinase and the HC-pro cleave only their respective C-termini
CC autocatalytically (By similarity). {ECO:0000250}.
CC -!- MISCELLANEOUS: [Isoform P3N-PIPO polyprotein]: Produced by -1 ribosomal
CC frameshifting in P3 ORF.
CC -!- SIMILARITY: Belongs to the potyviridae P3N-PIPO polyprotein family.
CC {ECO:0000305}.
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DR EMBL; M95491; -; NOT_ANNOTATED_CDS; Genomic_RNA.
DR SMR; P0CK06; -.
DR Proteomes; UP000008616; Genome.
DR GO; GO:0044219; C:host cell plasmodesma; IEA:UniProtKB-SubCell.
DR GO; GO:0004197; F:cysteine-type endopeptidase activity; IEA:InterPro.
DR GO; GO:0008236; F:serine-type peptidase activity; IEA:UniProtKB-KW.
DR GO; GO:0006508; P:proteolysis; IEA:UniProtKB-KW.
DR GO; GO:0046740; P:transport of virus in host, cell to cell; IEA:UniProtKB-KW.
DR Gene3D; 3.90.70.150; -; 1.
DR InterPro; IPR001456; HC-pro.
DR InterPro; IPR031159; HC_PRO_CPD_dom.
DR InterPro; IPR042308; HC_PRO_CPD_sf.
DR InterPro; IPR002540; Pept_S30_P1_potyvir.
DR InterPro; IPR039560; Potyvirid-P3.
DR Pfam; PF00851; Peptidase_C6; 1.
DR Pfam; PF01577; Peptidase_S30; 1.
DR Pfam; PF13608; Potyvirid-P3; 1.
DR PROSITE; PS51744; HC_PRO_CPD; 1.
DR PROSITE; PS51871; PV_P1_PRO; 1.
PE 3: Inferred from homology;
KW Host cell junction; Host-virus interaction; Hydrolase; Protease;
KW Ribosomal frameshifting; Serine protease; Suppressor of RNA silencing;
KW Transport; Viral movement protein.
FT CHAIN 1..986
FT /note="P3N-PIPO polyprotein"
FT /id="PRO_0000420084"
FT CHAIN 1..284
FT /note="P1 proteinase"
FT /evidence="ECO:0000255"
FT /id="PRO_0000420085"
FT CHAIN 285..740
FT /note="Helper component proteinase"
FT /evidence="ECO:0000255"
FT /id="PRO_0000420086"
FT CHAIN 741..986
FT /note="Movement protein P3N-PIPO"
FT /id="PRO_0000408550"
FT DOMAIN 141..284
FT /note="Peptidase S30"
FT /evidence="ECO:0000255|PROSITE-ProRule:PRU01219"
FT DOMAIN 618..740
FT /note="Peptidase C6"
FT /evidence="ECO:0000255|PROSITE-ProRule:PRU01080"
FT MOTIF 334..337
FT /note="Involved in interaction with stylet and aphid
FT transmission"
FT /evidence="ECO:0000250"
FT MOTIF 592..594
FT /note="Involved in virions binding and aphid transmission"
FT /evidence="ECO:0000250"
FT ACT_SITE 192
FT /note="For P1 proteinase activity"
FT /evidence="ECO:0000255|PROSITE-ProRule:PRU01219"
FT ACT_SITE 201
FT /note="For P1 proteinase activity"
FT /evidence="ECO:0000255|PROSITE-ProRule:PRU01219"
FT ACT_SITE 235
FT /note="For P1 proteinase activity"
FT /evidence="ECO:0000255|PROSITE-ProRule:PRU01219"
FT ACT_SITE 626
FT /note="For helper component proteinase activity"
FT /evidence="ECO:0000255|PROSITE-ProRule:PRU01080"
FT ACT_SITE 699
FT /note="For helper component proteinase activity"
FT /evidence="ECO:0000255|PROSITE-ProRule:PRU01080"
FT SITE 284..285
FT /note="Cleavage; by P1 proteinase"
FT /evidence="ECO:0000255|PROSITE-ProRule:PRU01219"
FT SITE 740..741
FT /note="Cleavage; by autolysis"
FT /evidence="ECO:0000255|PROSITE-ProRule:PRU01080"
FT UNSURE 910..916
SQ SEQUENCE 986 AA; 111327 MW; 0861BAAE733E9002 CRC64;
MATYTSTIQI GSIECKLPYS PAPFGLVAGK REVSTTTDPF ASLEMQLSAR LRRQEFATIR
TSKNGTCMYR YKTDAQIARI QKKREERERE EYNFQMAASS VVSKITIAGG EPPSKLESQV
RKGVIHTTPR MRTAKTYRTP KLTEGQMNHL IKQVKQIMST KGGSVQLISK KSTHVHYKEV
LGSHRAVVCT AHMRGLRKRV DFRCDKWTVV RLQHLARTDK WTNQVRATDL RKGDSGVILS
NTNLKGHFGR SSEGLFIVRG SHEGKIYDAR SKVTQGVMDS MVQFSSAESF WEGLDGNWAQ
MRYPTDHTCV AGIPVEDCGR VAAIMTHSIL PCYKITCPTC AQQYANLPAS DLLKILHKHA
SDGLNRLGAD KDRFVHVKKF LTILEHLTEP VDLSLEIFNE VFKSIGEKQQ SPFKNLNILN
NFFLKGKENT AREWQVAQLS LLELARFQKN RTDNIKKGDI SFFRNKLSAK ANWNLYLSCD
NQLDKNANFL WGQREYHAKR FFSNYFEEID PAKGYSAYEN RLHPNGTRKL AIGNLIVPLD
LAEFRRKMKG DYKRQPGVSK KCTSSKDGNY VYPCCCTTLD DGSAVESTFY PPTKKHLVIG
NSGDQKYVDL PKGNSEMLYI ARQGFCYINI FLAMLINISE EDAKDFTKKV RDMCVPKLGT
WPTMMDLATT CAQMKIFYPD VHDAELPRIL VDHETQTCHV VDSFGSQTTG YHILKASSVS
QLILFANDEL ESDIKHYRVG GIPNACPELG STISPFREGG VIMSESAALK LLLKGIFRPK
VMRQLLLDEP YLLILSILSP GILMAMYNNG IFELAVKLWI NEKQSIAMIA SLLSALALRV
SAAETLVAQR IIIDTAATDL LDATCDGFNL HLTYPTALMV LQVVKNRNEC DDTLFKAGFP
SYNTSVVQIM EKKLSKSLER CLERFNLAGK IIRNMVLIQS KTLYHSVHKT HRKGRFERVI
QHITTSILGP RCPGGQRHCL RIERAI
