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1.A.3.2.5
The Inositol Trisphosphate Receptor (IP 3 R) is Dispensable for Rotavirus-induced Ca 2+ Signaling and Replication but Critical for Paracrine Ca 2+ Signals that Prime Uninfected Cells for Rapid Virus Spread. Inositol 1,4,5-triphosphate receptor type 1 splice variant, IP(3)R1 (Subedi et al., 2012).  The human orthologue, IP3R3, is regulated at the ER-mitochondrion interface by BCL-XL (TC# 1.A.21.1.6) (Williams et al. 2016). Genetic polymorphisms of Ca2+ transport proteins and molecular chaperones in mitochondria-associated endoplasmic reticulum membranes and non-alcoholic fatty liver disease (NAFA5) have been identified. The variant genotypes of Ca2+ transport-associated genes HSPA5 (rs12009 and rs430397) and ITPR2 (rs11048570) probably contribute to the reduction of the NAFLD risk in Chinese Han population (Tang et al. 2022).  Host IP3R channels are dispensable for rotavirus Ca2+ signaling but critical for intercellular Ca2+ waves that prime uninfected cells for rapid virus spread (Perry et al. 2024). The IP3R is dispensable for rotavirus-induced Ca2+ signaling and replication but is critical for paracrine Ca2+ signals that prime uninfected cells for rapid virus spread (Perry et al. 2023).  

Accession Number:Q63269
Protein Name:Inositol 1,4,5-trisphosphate receptor type 3
Length:2670
Molecular Weight:304286.00
Species:Rattus norvegicus (Rat) [10116]
Number of TMSs:6
Location1 / Topology2 / Orientation3: Endoplasmic reticulum membrane1 / Multi-pass membrane protein2
Substrate calcium(2+)

Cross database links:

Entrez Gene ID: 25679   
Pfam: PF08709    PF00520    PF02815    PF08454    PF01365   
KEGG: rno:25679   

Gene Ontology

GO:0045177 C:apical part of cell
GO:0005903 C:brush border
GO:0005789 C:endoplasmic reticulum membrane
GO:0043209 C:myelin sheath
GO:0043025 C:neuronal cell body
GO:0005640 C:nuclear outer membrane
GO:0015085 F:calcium ion transmembrane transporter activity
GO:0043533 F:inositol 1,3,4,5 tetrakisphosphate binding
GO:0005220 F:inositol 1,4,5-trisphosphate-sensitive calcium-release channel activity
GO:0000822 F:inositol hexakisphosphate binding
GO:0005218 F:intracellular ligand-gated calcium channel activity
GO:0060402 P:calcium ion transport into cytosol
GO:0007186 P:G-protein coupled receptor signaling pathway
GO:0051291 P:protein heterooligomerization
GO:0051260 P:protein homooligomerization

References (3)

[1] “Sequence and functional characterization of a third inositol trisphosphate receptor subtype, IP3R-3, expressed in pancreatic islets, kidney, gastrointestinal tract, and other tissues.”  Blondel O.et.al.   8388391
[2] “Regulating ankyrin dynamics: roles of sigma-1 receptors.”  Hayashi T.et.al.   11149946
[3] “Identification of a family of calcium sensors as protein ligands of inositol trisphosphate receptor Ca(2+) release channels.”  Yang J.et.al.   12032348

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Predict TMSs (Predict number of transmembrane segments)
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FASTA formatted sequence
1:	MNEMSSFLHI GDIVSLYAEG SVNGFISTLG LVDDRCVVEP AAGDLDNPPK KFRDCLFKVC 
61:	PMNRYSAQKQ YWKAKQTKQD KEKIADVVLL QKLQHAAQME QKQNDTENKK VHGDVVKYGS 
121:	VIQLLHMKSN KYLTVNKRLP ALLEKNAMRV TLDATGNEGS WLFIQPFWKL RSNGDNVVVG 
181:	DKVILNPVNA GQPLHASNYE LSDNVGCKEV NSVNCNTSWK INLFMQFRDH LEEVLKGGDV 
241:	VRLFHAEQEK FLTCDEYRGK LQVFLRTTLR QSATSATSSN ALWEVEVVHH DPCRGGAGHW 
301:	NGLYRFKHLA TGNYLAAEEN PSYKGDVSDP KAAGPGAQSR TGRRNAGEKI KYRLVAVPHG 
361:	NDIASLFELD PTTLQKTDSF VPRNSYVRLR HLCTNTWIQS TNAPIDVEEE RPIRLMLGTC 
421:	PTKEDKEAFA IVSVPVSEIR DLDFANDASS MLASAVEKLN EGFISQNDRR FVIQLLEDLV 
481:	FFVSDVPNNG QNVLDIMVTK PNRERQKLMR DENILKQIFG ILKAPFRDKG GEGPLVRLEE 
541:	LSDQKNAPYQ YMFRLCYRVL RHSQEDYRKN QEHIAKQFGM MQSQIGYDIL AEDTITALLH 
601:	NNRKLLEKHI TKTEVETFVS LVRKNREPRF LDYLSDLCVS NRIAIPVTQE LICKCVLDPK 
661:	NSDILIQTEL RPVKEMAQSH EYLSIEYSEE EVWLTWTDRN NEHHEKSVRQ LAQEARAGNA 
721:	HDENVLSYYR YQLKLFARMC LDRQYLAIDE ISKQLGVELL FLCMADEMLP FDLRASFCHL 
781:	MLHVHVDRDP QELVTPVKFA RLWTEIPTAI TIKDYDSNLN ASRDDKKNKF ASTMEFVEDY 
841:	LNNVVGEAVP FANDEKNILT FEVVSLAHNL IYFGFYSFSE LLRLTRTLLG IIDCIQAPAA 
901:	VLQAYEEPGG KNVRRSIQGV GHMMSTMVLS RKQSVFGASS LPTGVGVPEQ LDRSKFEDNE 
961:	HTVVMETKLK ILEILQFILN VRLDYRISYL LSVFKKEFVE VFPMQDSGAD GTAPAFDSST 
1021:	ANMNLDRIGE QAEAMFGVGK TSSMLEVDDE GGRMFLRVLL HLTMHDYPPL VSGALQLLFK 
1081:	HFSQRQEAMH TFKQVQLLIS AQDVENYKVI KSELDRLRTM VEKSELWVDK KGSVKGEEGE 
1141:	AGASKDKKER PSDEEGFLQP HGEKSSENYQ IVKGILERLN KMCGVGEQMR KKQQRLLKNM 
1201:	DAHKVMLDLL QIPYDKNDNK MMEILRYTHQ FLQKFCAGNP GNQALLHKHL QLFLTPGLLE 
1261:	AETMQHIFLN NYQLCSEISE PVLQHFVHCW PTHGRHVQYL DFLHTVIKAE GKYVKKCQDM 
1321:	IMTELTNAGD DVVVFYNDKA SLAHLLDMMK AARDGVEDHS PLMYHISLVD LLAACAEGKN 
1381:	VYTEIKCTSL LPLEDVVSVV THEDCITEVK MAYVNFVNHC YVDTEVEMKE IYTSNHIWTL 
1441:	FENFTLDMAL VCNKREKRLS DPTLEKYVLT VVLDTISAFF SSPFSENSTS LQTHQTIVVQ 
1501:	LLQSTTRLLE CPWLQQQHKG SVEACVRTLA MVAKSRAILL PMDLDAHMSA LLSSGGSCSA 
1561:	AAQRSAANYK TATRTFPRVI PTANQWDYKN IIEKLQDIIT ALEERLKPLV QAELSVLVDM 
1621:	LHWPELLFLE GSEAYQRCES GGFLSKLIRH TKGLMESEEK LCVKVLRTLQ QMLQKKSKYG 
1681:	DRGNQLRKML LQNYLQNRKS GPRGELTDPT GSGVDQDWSA IAATQCRLDK EGATKLVCDL 
1741:	ITSTKNEKIF QESIGLAIRL LDGGNTEIQK SFYNLMTSDK KSERFFKVLH DRMKRAQQET 
1801:	KSTVAVNMSD LGSQPREDRE PADPTTKGRV SSFSMPSSSR YSLGPGLHRG HDVSERAQNN 
1861:	EMGTSVLIMR PILRFLQLLC ENHNRDLQNF LRCQNNKTNY NLVCETLQFL DIMCGSTTGG 
1921:	LGLLGLYINE DNVGLVIQTL ETLTEYCQGP CHENQTCIVT HESNGIDIIT ALILNDISPL 
1981:	CKYRMDLVLQ LKDNASKLLL ALMESRHDSE NAERILISLR PQELVDVIKK AYLQEEEREN 
2041:	SEVSPREVGH NIYILALQLS RHNKQLQHLL KPVKRIQEEE AEGISSMLSL NNKQLSQMLK 
2101:	SSAPAQEEEE DPLAYYENHT SQIEIVRQDR SMEQIVFPVP AICQFLTEET KHRLFTTTEQ 
2161:	DEQGSKVSDF FDQSSFLHNE MEWQRRLRSM PLIYWFSRRM TLWGSISFNL AVFINIIIAF 
2221:	FYPYVEGAST GVLGSPLISL LFWILICFSI AALFTKHYSV RPLIVALVLR SIYYLGIGPT 
2281:	LNILGALNLT NKIVFVVSFV GNRGTFIRGY KAMVMDMEFL YHVGYILTSV LGLFAHELFY 
2341:	SILLFDLIYR EETLFNVIKS VTRNGRSILL TALLALILVY LFSIVGFLFL KDDFILEVDR 
2401:	LPGNHSRAST LGMPHGAATF MGTCSGDKMD CVSEVSVPEI LEEDEELDST ERACDTLLMC 
2461:	IVTVMNHGLR NGGGVGDILR KPSKDESLFP ARVVYDLLFF FIVIIIVLNL IFGVIIDTFA 
2521:	DLRSEKQKKE EILKTTCFIC GLERDKFDNK TVSFEEHIKL EHNMWNYLYF IVLVRVKNKT 
2581:	DYTGPESYVA QMIKNKNLDW FPRMRAMSLV SGEGEGEQNE IRILQEKLGS TMKLVSHLTA 
2641:	QLNELKEQMT EQRKRRQRLG FVDVQNCMSR