UniProtKB - A0A0U2MS74 (A0A0U2MS74_MERS)
Protein
Spike glycoprotein
Gene
S
Organism
Middle East respiratory syndrome-related coronavirus (MERS-CoV)
Status
Functioni
Spike protein S1: attaches the virion to the cell membrane by interacting with host receptor, initiating the infection.UniRule annotation
Spike protein S2': Acts as a viral fusion peptide which is unmasked following S2 cleavage occurring upon virus endocytosis.UniRule annotation
Spike protein S2: mediates fusion of the virion and cellular membranes by acting as a class I viral fusion protein. Under the current model, the protein has at least three conformational states: pre-fusion native state, pre-hairpin intermediate state, and post-fusion hairpin state. During viral and target cell membrane fusion, the coiled coil regions (heptad repeats) assume a trimer-of-hairpins structure, positioning the fusion peptide in close proximity to the C-terminal region of the ectodomain. The formation of this structure appears to drive apposition and subsequent fusion of viral and target cell membranes.UniRule annotation
Caution
Lacks conserved residue(s) required for the propagation of feature annotation.UniRule annotation
GO - Biological processi
- endocytosis involved in viral entry into host cell Source: UniProtKB-UniRule
- fusion of virus membrane with host endosome membrane Source: UniProtKB-UniRule
- fusion of virus membrane with host plasma membrane Source: UniProtKB-UniRule
- pathogenesis Source: UniProtKB-KW
- receptor-mediated virion attachment to host cell Source: UniProtKB-UniRule
Keywordsi
Biological process | Fusion of virus membrane with host endosomal membraneUniRule annotationARBA annotation, Fusion of virus membrane with host membrane, Host-virus interaction, Viral attachment to host cellUniRule annotationARBA annotation, Viral penetration into host cytoplasm, VirulenceUniRule annotationARBA annotation, Virus entry into host cell |
Names & Taxonomyi
Protein namesi | Recommended name: Spike glycoproteinUniRule annotationShort name: S glycoproteinUniRule annotation Alternative name(s): E2UniRule annotation Peplomer proteinUniRule annotation Cleaved into the following 3 chains: Spike protein S1UniRule annotation Spike protein S2UniRule annotation Spike protein S2'UniRule annotation |
Gene namesi | Name:SUniRule annotation |
Organismi | Middle East respiratory syndrome-related coronavirus (MERS-CoV)Imported |
Taxonomic identifieri | 1335626 [NCBI] |
Taxonomic lineagei | Viruses › Riboviria › Orthornavirae › Pisuviricota › Pisoniviricetes › Nidovirales › Cornidovirineae › Coronaviridae › Orthocoronavirinae › Betacoronavirus › Merbecovirus |
Subcellular locationi
- Virion membrane UniRule annotation; Single-pass type I membrane protein UniRule annotation
- Host endoplasmic reticulum-Golgi intermediate compartment membrane UniRule annotation; Single-pass type I membrane protein UniRule annotation
- Host cell membrane UniRule annotation; Single-pass type I membrane protein UniRule annotation Note: Accumulates in the endoplasmic reticulum-Golgi intermediate compartment, where it participates in virus particle assembly. Some S oligomers are transported to the host plasma membrane, where they may mediate cell-cell fusion.UniRule annotation
Topology
Feature key | Position(s) | DescriptionActions | Graphical view | Length |
---|---|---|---|---|
Transmembranei | 1297 – 1320 | HelicalSequence analysisAdd BLAST | 24 | |
Topological domaini | 1318 – 1353 | CytoplasmicUniRule annotationAdd BLAST | 36 |
GO - Cellular componenti
- host cell endoplasmic reticulum-Golgi intermediate compartment membrane Source: UniProtKB-SubCell
- host cell plasma membrane Source: UniProtKB-SubCell
- integral component of membrane Source: UniProtKB-UniRule
- viral envelope Source: UniProtKB-UniRule
- virion membrane Source: UniProtKB-SubCell
Keywords - Cellular componenti
Host cell membraneUniRule annotationARBA annotation, Host membrane, Membrane, Viral envelope proteinUniRule annotationARBA annotation, VirionPTM / Processingi
Molecule processing
Feature key | Position(s) | DescriptionActions | Graphical view | Length |
---|---|---|---|---|
ChainiPRO_5023472880 | 748 – 1353 | Spike protein S2UniRule annotationAdd BLAST | 606 | |
ChainiPRO_5023472879 | 888 – 1353 | Spike protein S2'UniRule annotationAdd BLAST | 466 |
Amino acid modifications
Feature key | Position(s) | DescriptionActions | Graphical view | Length |
---|---|---|---|---|
Disulfide bondi | 425 ↔ 478 | UniRule annotation |
Post-translational modificationi
Specific enzymatic cleavages in vivo yield mature proteins. The precursor is processed into S1 and S2 by host cell furin or another cellular protease to yield the mature S1 and S2 proteins. Additionally, a second cleavage leads to the release of a fusion peptide after viral attachment to host cell receptor.UniRule annotation
The cytoplasmic Cys-rich domain is palmitoylated. Spike glycoprotein is digested within host endosomes.UniRule annotation
Sites
Feature key | Position(s) | DescriptionActions | Graphical view | Length |
---|---|---|---|---|
Sitei | 887 – 888 | CleavageUniRule annotation | 2 |
Keywords - PTMi
Disulfide bondUniRule annotationARBA annotation, GlycoproteinUniRule annotationARBA annotation, Lipoprotein, PalmitateUniRule annotationARBA annotationInteractioni
Subunit structurei
Homotrimer; each monomer consists of a S1 and a S2 subunit. The resulting peplomers protrude from the virus surface as spikes.
UniRule annotationFamily & Domainsi
Domains and Repeats
Feature key | Position(s) | DescriptionActions | Graphical view | Length |
---|---|---|---|---|
Domaini | 49 – 384 | bCoV_S1_NInterPro annotationAdd BLAST | 336 | |
Domaini | 394 – 586 | bCoV_S1_RBDInterPro annotationAdd BLAST | 193 | |
Domaini | 601 – 658 | CoV_S1_CInterPro annotationAdd BLAST | 58 | |
Domaini | 779 – 1315 | CoV_S2InterPro annotationAdd BLAST | 537 | |
Domaini | 1316 – 1353 | CoV_S2_CInterPro annotationAdd BLAST | 38 |
Region
Feature key | Position(s) | DescriptionActions | Graphical view | Length |
---|---|---|---|---|
Regioni | 888 – 909 | Fusion peptide 1UniRule annotationAdd BLAST | 22 | |
Regioni | 994 – 1044 | Heptad repeat 1UniRule annotationAdd BLAST | 51 | |
Regioni | 1246 – 1285 | Heptad repeat 2UniRule annotationAdd BLAST | 40 |
Coiled coil
Feature key | Position(s) | DescriptionActions | Graphical view | Length |
---|---|---|---|---|
Coiled coili | 1023 – 1067 | UniRule annotationAdd BLAST | 45 | |
Coiled coili | 1258 – 1286 | UniRule annotationAdd BLAST | 29 |
Motif
Feature key | Position(s) | DescriptionActions | Graphical view | Length |
---|---|---|---|---|
Motifi | 1349 – 1353 | KxHxxUniRule annotation | 5 |
Domaini
Fusion peptide 1 (FP1) and fusion peptide 2 (FP2) function cooperatively and have a membrane-ordering effect on lipid headgroups and shallow hydrophobic regions of target bilayers. They are considered as two domains of an extended, bipartite FP. The membrane-ordering activity is calcium-dependent and also dependent on correct folding, which is maintained by an internal disulfide bond in FP2.UniRule annotation
Sequence similaritiesi
Belongs to the betacoronaviruses spike protein family.UniRule annotation
Keywords - Domaini
Coiled coilUniRule annotationARBA annotation, SignalUniRule annotationARBA annotation, Transmembrane, Transmembrane helixUniRule annotationARBA annotationFamily and domain databases
Gene3Di | 1.20.5.790, 1 hit |
HAMAPi | MF_04099, BETA_CORONA_SPIKE, 1 hit |
InterProi | View protein in InterPro IPR032500, bCoV_S1_N IPR042578, BETA_CORONA_SPIKE IPR043607, CoV_S1_C IPR043473, S2_sf_CoV IPR027400, S_HR2_CoV IPR018548, Spike_rcpt-bd_bCoV IPR036326, Spike_rcpt-bd_sf_CoV IPR002552, Spike_S2_CoV IPR043614, Spike_S2_CoV_C |
Pfami | View protein in Pfam PF16451, bCoV_S1_N, 1 hit PF09408, bCoV_S1_RBD, 1 hit PF19209, CoV_S1_C, 1 hit PF01601, CoV_S2, 1 hit PF19214, CoV_S2_C, 1 hit |
SUPFAMi | SSF111474, SSF111474, 2 hits SSF143587, SSF143587, 1 hit |
i Sequence
Sequence statusi: Complete.
: The displayed sequence is further processed into a mature form. Sequence processingi
A0A0U2MS74-1 [UniParc]FASTAAdd to basket
10 20 30 40 50
MIHSVFLLMF LLTPTESYVD VGPDSVKSAC IAVDIQQTFF DKTWPRPIDV
60 70 80 90 100
SKADGIIYPQ GRTYSNITIT YQGLFPYQGD HGDMYVYSAG HATGTTPQKL
110 120 130 140 150
FVANYSQDVK QFANGFVVRI GAAANSTGTV IISPSTSATI RKIYPAFMLG
160 170 180 190 200
SSVGNFSDGK MGRFFNHTLV LLPDGCGTLL RAFYCILEPR SGNHCPAGNS
210 220 230 240 250
YTSFATYHTP ATDCSDGNYN RNASLNSFKE YFNLRNCTFM YTYNITEDEI
260 270 280 290 300
LEWFGITQTA QGVHLFSSRY VDLYGGNMFQ FATLPVYDTI KYYSIIPHSI
310 320 330 340 350
RSIQSDRKAW AAFYVYKLQP LTFLLDFSVD GYIRRAIDCG FNDLSQLHCS
360 370 380 390 400
YESFDVESGV YSVSSFEAKP SGSVVEQAEG VECDFSPLLS GTPPQVYNFK
410 420 430 440 450
RLVFTNCNYN LTKLLSLFSV NDFTCSQISP AAIASNCYSS LILDYFSYPL
460 470 480 490 500
SMKSDLSVSS AGPISQFNYK QSFSNPTCLI LATVPHNLTT ITKPLKYSYI
510 520 530 540 550
NKCSRLLSDD RTEVPQLVNA NQYSPCVSIV PSTVWEDGDY YRKQLSPLEG
560 570 580 590 600
GGWLVASGST VAMTEQLQMG FGITVQYGTD TNSVCPKLEF ANDTKIASQL
610 620 630 640 650
GNCVEYSLYG VSGRGVFQNC TAVGVRQQRF VYDAYQNLVG YYSDDGNYYC
660 670 680 690 700
LRACVSVPVS VIYDKETKTH ATLFGSVACE HISSTMSQYS RSTRSMLKRR
710 720 730 740 750
DSTYGPLQTP VGCVLGLVNS SLFVEDCKLP LGQSLCALPD TPSTLXPRSV
760 770 780 790 800
RSVPGEMRLA SIAFNHPIQV DQLNSSYFKL SIPTNFSFGV TQEYIQTTIQ
810 820 830 840 850
KVTVDCKQYV CNGFQKCEQL LREYGQFCSK INQALHGANL RQDDSVRNLF
860 870 880 890 900
ASVKSSQSSP IIPGFGGDFN LTLLEPVSIS TGSRSARSAI EDLLFDKVTI
910 920 930 940 950
ADPGYMQGYD DCMQQGPASA RDLICAQYVA GYKVLPPLMD VNMEAAYTSS
960 970 980 990 1000
LLGSIAGVGW TAGLSSFAAI PFAQSIFYRL NGVGITQQVL SENQKLIANK
1010 1020 1030 1040 1050
FNQALGAMQT GFTTTNEAFR KVQDAVNNNA QALSKLASEL SNTFGAISAS
1060 1070 1080 1090 1100
IGDIIQRLDV LEQDAQIDRL INGRLTTLNA FVAQQLVRSE SAALSAQLAK
1110 1120 1130 1140 1150
DKVNECVKAQ SKRSGFCGQG THIVSFVVNA PNGLYFMHVG YYPSNHIEVV
1160 1170 1180 1190 1200
SAYGLCDAAN PTNCIAPVNG YFIKTNNTRI VDEWSYTGSS FYAPEPITSL
1210 1220 1230 1240 1250
NTKYVAPQVT YQNISTNLPP PLLGNSTGID FQDELDEFFK NVSTSIPNFG
1260 1270 1280 1290 1300
SLTQINTTLL DLTYEMLSLQ QVVKALNESY IDLKELGNYT YYNKWPWYIW
1310 1320 1330 1340 1350
LGFIAGLVAL ALCVFFILCC TGCGTNCMGK LKCNRCCDRY EEYDLEPHKV
HVH
Sequence databases
Select the link destinations: EMBLi GenBanki DDBJi Links Updated | KT805971 Genomic RNA Translation: ALJ54451.1 |
Similar proteinsi
Cross-referencesi
Sequence databases
Select the link destinations: EMBLi GenBanki DDBJi Links Updated | KT805971 Genomic RNA Translation: ALJ54451.1 |
3D structure databases
ModBasei | Search... |
Family and domain databases
Gene3Di | 1.20.5.790, 1 hit |
HAMAPi | MF_04099, BETA_CORONA_SPIKE, 1 hit |
InterProi | View protein in InterPro IPR032500, bCoV_S1_N IPR042578, BETA_CORONA_SPIKE IPR043607, CoV_S1_C IPR043473, S2_sf_CoV IPR027400, S_HR2_CoV IPR018548, Spike_rcpt-bd_bCoV IPR036326, Spike_rcpt-bd_sf_CoV IPR002552, Spike_S2_CoV IPR043614, Spike_S2_CoV_C |
Pfami | View protein in Pfam PF16451, bCoV_S1_N, 1 hit PF09408, bCoV_S1_RBD, 1 hit PF19209, CoV_S1_C, 1 hit PF01601, CoV_S2, 1 hit PF19214, CoV_S2_C, 1 hit |
SUPFAMi | SSF111474, SSF111474, 2 hits SSF143587, SSF143587, 1 hit |
ProtoNeti | Search... |
MobiDBi | Search... |
Entry informationi
Entry namei | A0A0U2MS74_MERS | |
Accessioni | A0A0U2MS74Primary (citable) accession number: A0A0U2MS74 | |
Entry historyi | Integrated into UniProtKB/TrEMBL: | March 16, 2016 |
Last sequence update: | March 16, 2016 | |
Last modified: | October 7, 2020 | |
This is version 15 of the entry and version 1 of the sequence. See complete history. | ||
Entry statusi | Unreviewed (UniProtKB/TrEMBL) |