The following text describes a protein:
Function:
[N-terminal protease]: Leader cysteine autoprotease that cleaves itself from the nascent polyprotein during translation of the viral mRNA. Once released, plays a role in the inhibition of host innate immune response by interacting with host IRF3 and inducing its proteasomal degradation; [Capsid protein C]: Packages viral RNA to form a viral nucleocapsid and thereby protects viral RNA. Also plays a role in transcription regulation. Protects the incoming virus against IFN-induced effectors; [E(rns) glycoprotein]: Initial binding to target cell probably involves interaction of E(rns) with glycosaminoglycans. Also possesses intrinsic ribonuclease (RNase) activity that can inhibit the production of type I interferon and assist in the development of persistent infections (By similarity); [Envelope glycoprotein E1]: E1 and/or E2 are probably responsible of cell attachment with CD46 and subsequent fusion after internalization of the virion by endocytosis; [Envelope glycoprotein E2]: E1 and/or E2 are probably responsible of cell attachment with CD46 and subsequent fusion after internalization of the virion by endocytosis (Probable). Probably functions as a coeffector of fusion providing structural integrity to the fusion complex and possibly controlling exposure of the fusion motif in E1; [Viroporin p7]: Plays an essential role in the virus replication cycle by acting as a viroporin (By similarity). Forms ion conductive pores, which alters the cell permeability allowing the transport of ions and other small molecules (By similarity). Forms a leader sequence to properly orient NS2 in the membrane; [Non-structural protein 2-3]: Uncleaved NS2-3 is required for production of infectious virus; [Cysteine protease NS2]: Plays a role in the regulation of viral RNA replication; [Serine protease NS3]: Multifunctional protein that contains an N-terminal protease and a C-terminal helicase, playing essential roles in viral polyprotein processing and viral genome replication. The chymotrypsin-like serine protease activity utilizes NS4A as an essential cofactor and catalyzes the cleavage of the polyprotein leading to the release of NS4A, NS4B, NS5A, and NS5B. Interacts with NS5B to enhance RNA-dependent RNA polymerase activity; [Non-structural protein 4A]: Acts as a cofactor for the NS3 protease activity; [Non-structural protein 4B]: Induces a specific membrane alteration that serves as a scaffold for the virus replication complex (By similarity). Plays a role in the inhibition of host innate immune response by inhibiting RIGI/IFIH1-mediated IFN-beta production; [RNA-directed RNA polymerase]: Replicates the viral (+) and (-) genome. Initiates the primer-independent RNA replication via a de novo mechanism requiring GTP.
Miscellaneous:
MISCELLANEOUS: BVDV is divided in two types: cytopathic and non-cytopathic. Both types of viruses can be found in animals suffering from mucosal disease, as a cytopathic BVDV can develop from a non-cytopathic virus within the infected animal by deletions, mutations or insertions. Both types express uncleaved NS2-3, but cytopathic strains also express NS3. The cytopathic NADL strain contains an insertion (Jiv 90) that potentiate the partial cleavage of NS2-3. Removal of this insertion in the NADL Jiv 90(-) strain results in a non-cytopathic strain in which NS2-3 remains uncleaved.
Subcellular Localization:
[Capsid protein C]: Virion; [E(rns) glycoprotein]: Host membrane; Peripheral membrane protein. Virion membrane; Peripheral membrane protein. Note=The C-terminus membrane anchor of Erns represents an amphipathic helix embedded in plane into the membrane; [Envelope glycoprotein E1]: Host endoplasmic reticulum membrane; Single-pass type I membrane protein. Virion membrane; Single-pass type I membrane protein. Note=The C-terminal transmembrane domain acts as a signal sequence and forms a hairpin structure before cleavage by host signal peptidase. This explains that E1 and E2 are mostly lumenal. After cleavage, the C-terminus transmembrane sequence acts as ER membrane anchor; [Envelope glycoprotein E2]: Host endoplasmic reticulum membrane; Single-pass type I membrane protein. Virion membrane; Single-pass type I membrane protein. Note=The C-terminal transmembrane domain acts as a signal sequence and forms a hairpin structure before cleavage by host signal peptidase. This explains that E1 and E2 are mostly lumenal. After cleavage, the C-terminus transmembrane sequence acts as ER membrane anchor; [Cysteine protease NS2]: Host membrane; Multi-pass membrane protein; [Serine protease NS3]: Host cytoplasm; [Non-structural protein 4B]: Host cytoplasm; [Non-structural protein 5A]: Host membrane; Peripheral membrane protein. Note=The N-terminus membrane anchor represents an amphipathic helix embedded in plane into the membrane.
Domain:
[Envelope glycoprotein E1]: The transmembrane domain is responsible for ER localization; [Envelope glycoprotein E2]: The transmembrane domain is responsible for ER localization.
Sequence:
MELITNELLYKTYKQKPVGVEEPVYDQAGDPLFGERGAVHPQSTLKLPHKRGERDVPTNLASLPKRGDCRSGNSRGPVSGIYLKPGPLFYQDYKGPVYHRAPLELFEEGSMCETTKRIGRVTGSDGKLYHIYVCIDGCIIIKSATRSYQRVFRWVHNRLDCPLWVTTCSDTKEEGATKKKTQKPDRLERGKMKIVPKESEKDSKTKPPDATIVVEGVKYQVRKKGKTKSKNTQDGLYHNKNKPQESRKKLEKALLAWAIIAIVLFQVTMGENITQWNLQDNGTEGIQRAMFQRGVNRSLHGIWPEKICTGVPSHLATDIELKTIHGMMDASEKTNYTCCRLQRHEWNKHGWCNWYNIEPWILVMNRTQANLTEGQPPRECAVTCRYDRASDLNVVTQARDSPTPLTGCKKGKNFSFAGILMRGPCNFEIAASDVLFKEHERISMFQDTTLYLVDGLTNSLEGARQGTAKLTTWLGKQLGILGKKLENKSKTWFGAYAASPYCDVDRKIGYIWYTKNCTPACLPKNTKIVGPGKFGTNAEDGKILHEMGGHLSEVLLLSLVVLSDFAPETASVMYLILHFSIPQSHVDVMDCDKTQLNLTVELTTAEVIPGSVWNLGKYVCIRPNWWPYETTVVLAFEEVSQVVKLVLRALRDLTRIWNAATTTAFLVCLVKIVRGQMVQGILWLLLITGVQGHLDCKPEFSYAIAKDERIGQLGAEGLTTTWKEYSPGMKLEDTMVIAWCEDGKLMYLQRCTRETRYLAILHTRALPTSVVFKKLFDGRKQEDVVEMNDNFEFGLCPCDAKPIVRGKFNTTLLNGPAFQMVCPIGWTGTVSCTSFNMDTLATTVVRTYRRSKPFPHRQGCITQKNLGEDLHNCILGGNWTCVPGDQLLYKGGSIESCKWCGYQFKESEGLPHYPIGKCKLENETGYRLVDSTSCNREGVAIVPQGTLKCKIGKTTVQVIAMDTKLGPMPCRPYEIISSEGPVEKTACTFNYTKTLKNKYFEPRDSYFQQYMLKGEYQYWFDLEVTDHHRDYFAESILVVVVALLGGRYVLWLLVTYMVLSEQKALGIQYGSGEVVMMGNLLTHNNIEVVTYFLLLYLLLREESVKKWVLLLYHILVVHPIKSVIVILLMIGDVVKADSGGQEYLGKIDLCFTTVVLIVIGLIIARRDPTIVPLVTIMAALRVTELTHQPGVDIAVAVMTITLLMVSYVTDYFRYKKWLQCILSLVSAVFLIRSLIYLGRIEMPEVTIPNWRPLTLILLYLISTTIVTRWKVDVAGLLLQCVPILLLVTTLWADFLTLILILPTYELVKLYYLKTVRTDTERSWLGGIDYTRVDSIYDVDESGEGVYLFPSRQKAQGNFSILLPLIKATLISCVSSKWQLIYMSYLTLDFMYYMHRKVIEEISGGTNIISRLVAALIELNWSMEEEESKGLKKFYLLSGRLRNLIIKHKVRNETVASWYGEEEVYGMPKIMTIIKASTLSKSRHCIICTVCEGREWKGGTCPKCGRHGKPITCGMSLADFEERHYKRIFIREGNFEGMCSRCQGKHRRFEMDREPKSARYCAECNRLHPAEEGDFWAESSMLGLKITYFALMDGKVYDITEWAGCQRVGISPDTHRVPCHISFGSRMPFRQEYNGFVQYTARGQLFLRNLPVLATKVKMLMVGNLGEEIGNLEHLGWILRGPAVCKKITEHEKCHINILDKLTAFFGIMPRGTTPRAPVRFPTSLLKVRRGLETAWAYTHQGGISSVDHVTAGKDLLVCDSMGRTRVVCQSNNRLTDETEYGVKTDSGCPDGARCYVLNPEAVNISGSKGAVVHLQKTGGEFTCVTASGTPAFFDLKNLKGWSGLPIFEASSGRVVGRVKVGKNEESKPTKIMSGIQTVSKNRADLTEMVKKITSMNRGDFKQITLATGAGKTTELPKAVIEEIGRHKRVLVLIPLRAAAESVYQYMRLKHPSISFNLRIGDMKEGDMATGITYASYGYFCQMPQPKLRAAMVEYSYIFLDEYHCATPEQLAIIGKIHRFSESIRVVAMTATPAGSVTTTGQKHPIEEFIAPEVMKGEDLGSQFLDIAGLKIPVDEMKGNMLVFVPTRNMAVEVAKKLKAKGYNSGYYYSGEDPANLRVVTSQSPYVIVATNAIESGVTLPDLDTVIDTGLKCEKRVRVSSKIPFIVTGLKRMAVTVGEQAQRRGRVGRVKPGRYYRSQETATGSKDYHYDLLQAQRYGIEDGINVTKSFREMNYDWSLYEEDSLLITQLEILNNLLISEDLPAAVKNIMARTDHPEPIQLAYNSYEVQVPVLFPKIRNGEVTDTYENYSFLNARKLGEDVPVYIYATEDEDLAVDLLGLDWPDPGNQQVVETGKALKQVTGLSSAENALLVALFGYVGYQALSKRHVPMITDIYTIEDQRLEDTTHLQYAPNAIKTDGTETELKELASGDVEKIMGAISDYAAGGLEFVKSQAEKIKTAPLFKENAEAAKGYVQKFIDSLIENKEEIIRYGLWGTHTALYKSIAARLGHETAFATLVLKWLAFGGESVSDHVKQAAVDLVVYYVMNKPSFPGDSETQQEGRRFVASLFISALATYTYKTWNYHNLSKVVEPALAYLPYATSALKMFTPTRLESVVILSTTIYKTYLSIRKGKSDGLLGTGISAAMEILSQNPVSVGISVMLGVGAIAAHNAIESSEQKRTLLMKVFVKNFLDQAATDELVKENPEKIIMALFEAVQTIGNPLRLIYHLYGVYYKGWEAKELSERTAGRNLFTLIMFEAFELLGMDSQGKIRNLSGNYILDLIYGLHKQINRGLKKMVLGWAPAPFSCDWTPSDERIRLPTDNYLRVETRCPCGYEMKAFKNVGGKLTKVEESGPFLCRNRPGRGPVNYRVTKYYDDNLREIKPVAKLEGQVEHYYKGVTAKIDYSKGKMLLATDKWEVEHGVITRLAKRYTGVGFNGAYLGDEPNHRALVERDCATITKNTVQFLKMKKGCAFTYDLTISNLTRLIELVHRNNLEEKEIPTATVTTWLAYTFVNEDVGTIKPVLGERVIPDPVVDINLQPEVQVDTSEVGITIIGRETLMTTGVTPVLEKVEPDASDNQNSVKIGLDEGNYPGPGIQTHTLTEEIHNRDARPFIMILGSRNSISNRAKTARNINLYTGNDPREIRDLMAAGRMLVVALRDVDPELSEMVDFKGTFLDREALEALSLGQPKPKQVTKEAVRNLIEQKKDVEIPNWFASDDPVFLEVALKNDKYYLVGDVGELKDQAKALGATDQTRIIKEVGSRTYAMKLSSWFLKASNKQMSLTPLFEELLLRCPPATKSNKGHMASAYQLAQGNWEPLGCGVHLGTIPARRVKIHPYEAYLKLKDFIEEEEKKPRVKDTVIREHNKWILKKIRFQGNLNTKKMLNPGKLSEQLDREGRKRNIYNHQIGTIMSSAGIRLEKLPIVRAQTDTKTFHEAIRDKIDKSENRQNPELHNKLLEIFHTIAQPTLKHTYGEVTWEQLEAGVNRKGAAGFLEKKNIGEVLDSEKHLVEQLVRDLKAGRKIKYYETAIPKNEKRDVSDDWQAGDLVVEKRPRVIQYPEAKTRLAITKVMYNWVKQQPVVIPGYEGKTPLFNIFDKVRKEWDSFNEPVAVSFDTKAWDTQVTSKDLQLIGEIQKYYYKKEWHKFIDTITDHMTEVPVITADGEVYIRNGQRGSGQPDTSAGNSMLNVLTMMYGFCESTGVPYKSFNRVARIHVCGDDGFLITEKGLGLKFANKGMQILHEAGKPQKITEGEKMKVAYRFEDIEFCSHTPVPVRWSDNTSSHMAGRDTAVILSKMATRLDSSGERGTTAYEKAVAFSFLLMYSWNPLVRRICLLVLSQQPETDPSKHATYYYKGDPIGAYKDVIGRNLSELKRTGFEKLANLNLSLSTLGVWTKHTSKRIIQDCVAIGKEEGNWLVKPDRLISSKTGHLYIPDKGFTLQGKHYEQLQLRTETNPVMGVGTERYKLGPIVNLLLRRLKILLMTAVGVSS