HEMA_CVHN2
ID HEMA_CVHN2 Reviewed; 385 AA.
AC Q14EB1;
DT 21-AUG-2007, integrated into UniProtKB/Swiss-Prot.
DT 22-AUG-2006, sequence version 1.
DT 10-FEB-2021, entry version 67.
DE RecName: Full=Hemagglutinin-esterase {ECO:0000255|HAMAP-Rule:MF_04207};
DE Short=HE protein {ECO:0000255|HAMAP-Rule:MF_04207};
DE EC=3.1.1.53 {ECO:0000255|HAMAP-Rule:MF_04207};
DE AltName: Full=E3 glycoprotein {ECO:0000255|HAMAP-Rule:MF_04207};
DE Flags: Precursor;
GN Name=HE {ECO:0000255|HAMAP-Rule:MF_04207}; ORFNames=2;
OS Human coronavirus HKU1 (isolate N2) (HCoV-HKU1).
OC Viruses; Riboviria; Orthornavirae; Pisuviricota; Pisoniviricetes;
OC Nidovirales; Cornidovirineae; Coronaviridae; Orthocoronavirinae;
OC Betacoronavirus; Embecovirus.
OX NCBI_TaxID=443240;
OH NCBI_TaxID=9606; Homo sapiens (Human).
RN [1]
RP NUCLEOTIDE SEQUENCE [GENOMIC RNA].
RX PubMed=16809319; DOI=10.1128/jvi.00509-06;
RA Woo P.C.Y., Lau S.K.P., Yip C.C.Y., Huang Y., Tsoi H.-W., Chan K.-H.,
RA Yuen K.-Y.;
RT "Comparative analysis of 22 coronavirus HKU1 genomes reveals a novel
RT genotype and evidence of natural recombination in coronavirus HKU1.";
RL J. Virol. 80:7136-7145(2006).
CC -!- FUNCTION: Structural protein that makes short spikes at the surface of
CC the virus. Contains receptor binding and receptor-destroying
CC activities. Mediates de-O-acetylation of N-acetyl-4-O-acetylneuraminic
CC acid, which is probably the receptor determinant recognized by the
CC virus on the surface of erythrocytes and susceptible cells. This
CC receptor-destroying activity is important for virus release as it
CC probably helps preventing self-aggregation and ensures the efficient
CC spread of the progeny virus from cell to cell. May serve as a secondary
CC viral attachment protein for initiating infection, the spike protein
CC being the major one. May become a target for both the humoral and the
CC cellular branches of the immune system. {ECO:0000255|HAMAP-
CC Rule:MF_04207}.
CC -!- CATALYTIC ACTIVITY:
CC Reaction=H2O + N-acetyl-9-O-acetylneuraminate = acetate + H(+) + N-
CC acetylneuraminate; Xref=Rhea:RHEA:22600, ChEBI:CHEBI:15377,
CC ChEBI:CHEBI:15378, ChEBI:CHEBI:28999, ChEBI:CHEBI:30089,
CC ChEBI:CHEBI:35418; EC=3.1.1.53; Evidence={ECO:0000255|HAMAP-
CC Rule:MF_04207};
CC -!- CATALYTIC ACTIVITY:
CC Reaction=H2O + N-acetyl-4-O-acetylneuraminate = acetate + H(+) + N-
CC acetylneuraminate; Xref=Rhea:RHEA:25564, ChEBI:CHEBI:15377,
CC ChEBI:CHEBI:15378, ChEBI:CHEBI:29006, ChEBI:CHEBI:30089,
CC ChEBI:CHEBI:35418; EC=3.1.1.53; Evidence={ECO:0000255|HAMAP-
CC Rule:MF_04207};
CC -!- SUBUNIT: Homodimer; disulfide-linked. Forms a complex with the M
CC protein in the pre-Golgi. Associates then with S-M complex to form a
CC ternary complex S-M-HE. {ECO:0000255|HAMAP-Rule:MF_04207}.
CC -!- SUBCELLULAR LOCATION: Virion membrane {ECO:0000255|HAMAP-
CC Rule:MF_04207}; Single-pass type I membrane protein {ECO:0000255|HAMAP-
CC Rule:MF_04207}. Host cell membrane {ECO:0000255|HAMAP-Rule:MF_04207};
CC Single-pass type I membrane protein {ECO:0000255|HAMAP-Rule:MF_04207}.
CC Note=In infected cells becomes incorporated into the envelope of
CC virions during virus assembly at the endoplasmic reticulum and cis
CC Golgi. However, some may escape incorporation into virions and
CC subsequently migrate to the cell surface. {ECO:0000255|HAMAP-
CC Rule:MF_04207}.
CC -!- PTM: N-glycosylated in the host RER. {ECO:0000255|HAMAP-Rule:MF_04207}.
CC -!- MISCELLANEOUS: Isolate N2 belongs to genotype B.
CC -!- SIMILARITY: Belongs to the influenza type C/coronaviruses
CC hemagglutinin-esterase family. {ECO:0000255|HAMAP-Rule:MF_04207}.
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DR EMBL; AY884001; AAX76520.1; -; Genomic_RNA.
DR SMR; Q14EB1; -.
DR Proteomes; UP000006551; Genome.
DR GO; GO:0020002; C:host cell plasma membrane; IEA:UniProtKB-SubCell.
DR GO; GO:0016021; C:integral component of membrane; IEA:UniProtKB-UniRule.
DR GO; GO:0019031; C:viral envelope; IEA:UniProtKB-UniRule.
DR GO; GO:0055036; C:virion membrane; IEA:UniProtKB-SubCell.
DR GO; GO:0046789; F:host cell surface receptor binding; IEA:UniProtKB-UniRule.
DR GO; GO:0106331; F:sialate 4-O-acetylesterase activity; IEA:UniProtKB-EC.
DR GO; GO:0106330; F:sialate 9-O-acetylesterase activity; IEA:UniProtKB-EC.
DR GO; GO:0001681; F:sialate O-acetylesterase activity; ISS:UniProtKB.
DR GO; GO:0019064; P:fusion of virus membrane with host plasma membrane; IEA:UniProtKB-UniRule.
DR HAMAP; MF_04207; BETA_CORONA_HE; 1.
DR InterPro; IPR008980; Capsid_hemagglutn.
DR InterPro; IPR042545; HEMA.
DR InterPro; IPR007142; Hemagglutn-estrase_core.
DR InterPro; IPR003860; Hemagglutn-estrase_hemagglutn.
DR Pfam; PF03996; Hema_esterase; 1.
DR Pfam; PF02710; Hema_HEFG; 1.
DR SUPFAM; SSF49818; SSF49818; 1.
PE 3: Inferred from homology;
KW Disulfide bond; Glycoprotein; Hemagglutinin; Host cell membrane;
KW Host membrane; Hydrolase; Membrane; Signal; Transmembrane;
KW Transmembrane helix; Viral envelope protein; Virion.
FT SIGNAL 1..11
FT /evidence="ECO:0000255|HAMAP-Rule:MF_04207"
FT CHAIN 12..385
FT /note="Hemagglutinin-esterase"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_04207"
FT /id="PRO_0000297762"
FT TOPO_DOM 12..361
FT /note="Virion surface"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_04207"
FT TRANSMEM 362..382
FT /note="Helical"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_04207"
FT TOPO_DOM 383..385
FT /note="Intravirion"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_04207"
FT REGION 1..121
FT /note="Esterase domain 1"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_04207"
FT REGION 122..239
FT /note="Receptor binding"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_04207"
FT REGION 240..352
FT /note="Esterase domain 2"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_04207"
FT ACT_SITE 34
FT /note="Nucleophile"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_04207"
FT ACT_SITE 299
FT /note="Charge relay system"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_04207"
FT ACT_SITE 302
FT /note="Charge relay system"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_04207"
FT CARBOHYD 83
FT /note="N-linked (GlcNAc...) asparagine; by host"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_04207"
FT CARBOHYD 110
FT /note="N-linked (GlcNAc...) asparagine; by host"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_04207"
FT CARBOHYD 145
FT /note="N-linked (GlcNAc...) asparagine; by host"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_04207"
FT CARBOHYD 171
FT /note="N-linked (GlcNAc...) asparagine; by host"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_04207"
FT CARBOHYD 196
FT /note="N-linked (GlcNAc...) asparagine; by host"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_04207"
FT CARBOHYD 251
FT /note="N-linked (GlcNAc...) asparagine; by host"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_04207"
FT CARBOHYD 289
FT /note="N-linked (GlcNAc...) asparagine; by host"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_04207"
FT CARBOHYD 331
FT /note="N-linked (GlcNAc...) asparagine; by host"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_04207"
FT DISULFID 38..59
FT /evidence="ECO:0000255|HAMAP-Rule:MF_04207"
FT DISULFID 107..155
FT /evidence="ECO:0000255|HAMAP-Rule:MF_04207"
FT DISULFID 183..249
FT /evidence="ECO:0000255|HAMAP-Rule:MF_04207"
FT DISULFID 191..222
FT /evidence="ECO:0000255|HAMAP-Rule:MF_04207"
FT DISULFID 280..285
FT /evidence="ECO:0000255|HAMAP-Rule:MF_04207"
FT DISULFID 320..344
FT /evidence="ECO:0000255|HAMAP-Rule:MF_04207"
SQ SEQUENCE 385 AA; 44466 MW; D015CC6DA1E9F6B1 CRC64;
MLIIFLFFNF CYGFNEPLNV VSHLNHDWFL FGDSRSDCNH INNLKIKNYG YLDIHPSLCN
NGKISSSAGD SIFKSYHFTR FYNYTGEGDQ IIFYEGVNFN PHHRFKCFFN GSNDVWIFNK
VRFYRALYSN MALFRYLTFV DILYNFSFSI KANICNSNIL SLNNPIFIST NYSKDVYFTL
SGCSLYLVPL CLFKSNFSQY YYNMDTGFAY GYSNFVSSDL DCTYISLKPG SYKIFSTGFV
LSIPTKALCF NKSKQFVPVQ VVDSRWNNLR ASDTSLSDAC QLPYCYFRNS SGNYVGKYDI
NHGDNGFTSI LSGLLYNVSC ISYYGSFLYD NFTSIWPRFS FGNCPTSAYI KLNCFYDPLP
IILQGILLFL ALLFIVFLLF LVYHG
