2024-10-30 REL RCSB RCSB RCSB 2018-10-22 2018-11-14 2018-12-05 2024-10-30 National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS) R01GM072804 United States National Institutes of Health/National Institute of Neurological Disorders and Stroke (NIH/NINDS) R21NS106968 United States National Institutes of Health/National Institute of Arthritis and Musculoskeletal and Skin Diseases (NIH/NIAMS) R21AR063255 United States National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS) R01GM080139 United States American Heart Association 16GRNT2972000 United States National Science Foundation (NSF, United States) DBI-1356306 United States Serysheva II Fan G Baker MR Wang Z Seryshev A Ludtke SJ Baker ML inositol 1, 4, 5-trisphosphate receptor, calcium release channel, neuronal type 1, MEMBRANE PROTEIN Fan G Baker MR Wang Z Seryshev AB Ludtke SJ Baker ML Serysheva II Cell Res. CN 28 1158 1170 2018 30470765 doi:10.1038/s41422-018-0108-5 1748-7838 EMD-9243 other EM volume 6mu2 FULLOVERLAP Inositol 1,4,5-trisphosphate receptor Inositol 1,4,5-trisphosphate receptor 0 1

tetrameric assembly

Rattus norvegicus Brain Cerebellum endoplasmic reticulum membrane 1.3 Inositol 1,4,5-trisphosphate receptor type 1 Rattus norvegicus Brain cerebellum 0.313657406 4 LEVO MSDKMSSFLHIGDICSLYAEGSTNGFISTLGLVDDRCVVQPEAGDLNNPPKKFRDCLFKLCPMNRYSAQKQFWKAAKPGA NSTTDAVLLNKLHHAADLEKKQNETENRKLLGTVIQYGNVIQLLHLKSNKYLTVNKRLPALLEKNAMRVTLDEAGNEGSW FYIQPFYKLRSIGDSVVIGDKVVLNPVNAGQPLHASSHQLVDNPGCNEVNSVNCNTSWKIVLFMKWSDNKDDILKGGDVV RLFHAEQEKFLTCDEHRKKQHVFLRTTGRQSATSATSSKALWEVEVVQHDPCRGGAGYWNSLFRFKHLATGHYLAAEVDP DFEEECLEFQPSVDPDQDASRSRLRNAQEKMVYSLVSVPEGNDISSIFELDPTTLRGGDSLVPRNSYVRLRHLCTNTWVH STNIPIDKEEEKPVMLKIGTSPLKEDKEAFAIVPVSPAEVRDLDFANDASKVLGSIAGKLEKGTITQNERRSVTKLLEDL VYFVTGGTNSGQDVLEVVFSKPNRERQKLMREQNILKQIFKLLQAPFTDCGDGPMLRLEELGDQRHAPFRHICRLCYRVL RHSQQDYRKNQEYIAKQFGFMQKQIGYDVLAEDTITALLHNNRKLLEKHITAAEIDTFVSLVRKNREPRFLDYLSDLCVS MNKSIPVTQELICKAVLNPTNADILIETKLVLSRFEFEGVSTGENALEAGEDEEEVWLFWRDSNKEIRSKSVRELAQDAK EGQKEDRDVLSYYRYQLNLFARMCLDRQYLAINEISGQLDVDLILRCMSDENLPYDLRASFCRLMLHMHVDRDPQEQVTP VKYARLWSEIPSEIAIDDYDSSGASKDEIKERFAQTMEFVEEYLRDVVCQRFPFSDKEKNKLTFEVVNLARNLIYFGFYN FSDLLRLTKILLAILDCVHVTTIFPISKMTKGEENKGSNVMRSIHGVGELMTQVVLRGGGFLPMTPMAAAPEGNVKQAEP EKEDIMVMDTKLKIIEILQFILNVRLDYRISCLLCIFKREFDESNSQSSETSSGNSSQEGPSNVPGALDFEHIEEQAEGI FGGSEENTPLDLDDHGGRTFLRVLLHLTMHDYPPLVSGALQLLFRHFSQRQEVLQAFKQVQLLVTSQDVDNYKQIKQDLD QLRSIVEKSELWVYKGQGPDEPMDGASGENEHKKTEEGTSKPLKHESTSSYNYRVVKEILIRLSKLCVQESASVRKSRKQ QQRLLRNMGAHAVVLELLQIPYEKAEDTKMQEIMRLAHEFLQNFCAGNQQNQALLHKHINLFLNPGILEAVTMQHIFMNN FQLCSEINERVVQHFVHCIETHGRNVQYIKFLQTIVKAEGKFIKKCQDMVMAELVNSGEDVLVFYNDRASFQTLIQMMRS ERDRMDENSPLFMYHIHLVELLAVCTEGKNVYTEIKCNSLLPLDDIVRVVTHEDCIPEVKIAYINFLNHCYVDTEVEMKE IYTSNHMWKLFENFLVDICRACNNTSDRKHADSVLEKYVTEIVMSIVTTFFSSPFSDQSTTLQTRQPVFVQLLQGVFRVY HCNWLMPSQKASVESCIRVLSDVAKSRAIAIPVDLDSQVNNLFLKSHNIVQKTAMNWRLSARNAARRDSVLAASRDYRNI IERLQDIVSALEDRLRPLVQAELSVLVDVLHRPELLFPENTDARRKCESGGFICKLIKHTKQLLEENEEKLCIKVLQTLR EMMTKDRGYGEKQISIDELENAELPQPPEAENSTEQELEPSPPLRQLEDHKRGEALRQILVNRYYGNIRPSGRRESLTSF GNGPLSPGGPSKPGGGGGGPGSGSTSRGEMSLAEVQCHLDKEGASNLVIDLIMNASSDRVFHESILLAIALLEGGNTTIQ HSFFCRLTEDKKSEKFFKVFYDRMKVAQQEIKATVTVNTSDLGNKKKDDEVDRDAPSRKKAKEPTTQITEEVRDQLLEAS AATRKAFTTFRREADPDDHYQSGEGTQATTDKAKDDLEMSAVITIMQPILRFLQLLCENHNRDLQNFLRCQNNKTNYNLV CETLQFLDCICGSTTGGLGLLGLYINEKNVALINQTLESLTEYCQGPCHENQNCIATHESNGIDIITALILNDINPLGKK RMDLVLELKNNASKLLLAIMESRHDSENAERILYNMRPKELVEVIKKAYMQGEVEFEDGENGEDGAASPRNVGHNIYILA HQLARHNKELQTMLKPGGQVDGDEALEFYAKHTAQIEIVRLDRTMEQIVFPVPSICEFLTKESKLRIYYTTERDEQGSKI NDFFLRSEDLFNEMNWQKKLRAQPVLYWCARNMSFWSSISFNLAVLMNLLVAFFYPFKGVRGGTLEPHWSGLLWTAMLIS LAIVIALPKPHGIRALIASTILRLIFSVGLQPTLFLLGAFNVCNKIIFLMSFVGNCGTFTRGYRAMVLDVEFLYHLLYLL ICAMGLFVHEFFYSLLLFDLVYREETLLNVIKSVTRNGRPIILTAALALILVYLFSIVGYLFFKDDFILEVDRLPNETAG PETGESLANDFLYSDVCRVETGENCTSPAPKEELLPVEETEQDKEHTCETLLMCIVTVLSHGLRSGGGVGDVLRKPSKEE PLFAARVIYDLLFFFMVIIIVLNLIFGVIIDTFADLRSEKQKKEEILKTTCFICGLERDKFDNKTVTFEEHIKEEHNMWH YLCFIVLVKVKDSTEYTGPESYVAEMIRERNLDWFPRMRAMSLVSSDSEGEQNELRNLQEKLESTMKLVTNLSGQLSELK DQMTEQRKQKQRIGLLGHPPHMNVNPQQPA P29994 singleParticle particle 0.1 7.4

50 mM Tris-HCl buffer (pH 7.4), 150 mM NaCl, 1 mM DTT, 0.4% CHAPS, 2 mM EGTA, 1 mM EDTA, protease inhibitors

Quantifoil R2/1 COPPER 400 CARBON CONTINUOUS GLOW DISCHARGE 10 ETHANE 100 293 FEI VITROBOT MARK IV

Monodisperse sample

FEI TECNAI F30 FLOOD BEAM BRIGHT FIELD FIELD EMISSION GUN 300 GATAN 910 MULTI-SPECIMEN SINGLE TILT CRYO TRANSFER HOLDER NITROGEN 93.0 93.0 GATAN K2 SUMMIT (4k x 4k) COUNTING 2-17 9823 0.2 1.3 1 207914 EMD-6369 C4 3.9 FSC 0.143 CUT-OFF RELION 1.4

Image processing was performed independently using RELION and EMAN2 to near-atomic resolution in large regions of the structure. Local resolution assessment performed independently for each map revealed different domains were better resolved by each software package. To avoid human bias and extract the most information from each reconstruction the final map was a locally filtered average of the EMAN2 and RELION map. To combine the two maps, a local resolution filter, based on a windowed FSC local resolution assessment, was performed independently on the two maps. The two locally filtered maps were then averaged together. The local filtration determines the contribution of each map at each resolution in each region of the final composite map, permitting each map to dominate in regions where better self-consistency was obtained during refinement.

65438 MAXIMUM LIKELIHOOD RELION 1.4 MAXIMUM LIKELIHOOD RELION 1.4 5 RELION 1.4 AB INITIO MODEL REAL