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- PDB-9d57: iGABASnFR2 fluorescent GABA sensor in complex with GABA -

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Basic information

Entry
Database: PDB / ID: 9d57
TitleiGABASnFR2 fluorescent GABA sensor in complex with GABA
ComponentsABC transporter substrate-binding protein, Circular permuted superfolder GFP fusion
KeywordsFLUORESCENT PROTEIN / Genetically encoded GABA sensor / fluorescent sensor
Function / homologyGAMMA-AMINO-BUTANOIC ACID
Function and homology information
Biological speciessynthetic construct (others)
MethodX-RAY DIFFRACTION / SYNCHROTRON / MOLECULAR REPLACEMENT / Resolution: 2.6 Å
AuthorsZhang, Y. / Looger, L.L.
Funding support United States, 1items
OrganizationGrant numberCountry
Howard Hughes Medical Institute (HHMI) United States
CitationJournal: Biorxiv / Year: 2025
Title: iGABASnFR2: Improved genetically encoded protein sensors of GABA
Authors: Kolb, I. / Hasseman, J.P. / Matsumoto, A. / Jensen, T.P. / Kopach, O. / Arthur, B.J. / Zhang, Y. / Tsang, A. / Reep, D. / Tsegaye, G. / Zheng, J. / Patel, R.H. / Looger, L.L. / Marvin, J.S. ...Authors: Kolb, I. / Hasseman, J.P. / Matsumoto, A. / Jensen, T.P. / Kopach, O. / Arthur, B.J. / Zhang, Y. / Tsang, A. / Reep, D. / Tsegaye, G. / Zheng, J. / Patel, R.H. / Looger, L.L. / Marvin, J.S. / Korff, W.L. / Rusakov, D.A. / Yonehara, K. / Turner, G.C.
History
DepositionAug 13, 2024Deposition site: RCSB / Processing site: RCSB
Revision 1.0Aug 20, 2025Provider: repository / Type: Initial release

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

Downloads & links

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Assembly

Deposited unit
A: ABC transporter substrate-binding protein, Circular permuted superfolder GFP fusion
B: ABC transporter substrate-binding protein, Circular permuted superfolder GFP fusion
D: ABC transporter substrate-binding protein, Circular permuted superfolder GFP fusion
F: ABC transporter substrate-binding protein, Circular permuted superfolder GFP fusion
C: ABC transporter substrate-binding protein, Circular permuted superfolder GFP fusion
E: ABC transporter substrate-binding protein, Circular permuted superfolder GFP fusion
hetero molecules


Theoretical massNumber of molelcules
Total (without water)375,50012
Polymers374,8816
Non-polymers6196
Water57632
1
A: ABC transporter substrate-binding protein, Circular permuted superfolder GFP fusion
hetero molecules


Theoretical massNumber of molelcules
Total (without water)62,5832
Polymers62,4801
Non-polymers1031
Water181
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
2
B: ABC transporter substrate-binding protein, Circular permuted superfolder GFP fusion
hetero molecules


Theoretical massNumber of molelcules
Total (without water)62,5832
Polymers62,4801
Non-polymers1031
Water181
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
3
D: ABC transporter substrate-binding protein, Circular permuted superfolder GFP fusion
hetero molecules


Theoretical massNumber of molelcules
Total (without water)62,5832
Polymers62,4801
Non-polymers1031
Water181
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
4
F: ABC transporter substrate-binding protein, Circular permuted superfolder GFP fusion
hetero molecules


Theoretical massNumber of molelcules
Total (without water)62,5832
Polymers62,4801
Non-polymers1031
Water181
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
5
C: ABC transporter substrate-binding protein, Circular permuted superfolder GFP fusion
hetero molecules


Theoretical massNumber of molelcules
Total (without water)62,5832
Polymers62,4801
Non-polymers1031
Water181
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
6
E: ABC transporter substrate-binding protein, Circular permuted superfolder GFP fusion
hetero molecules


Theoretical massNumber of molelcules
Total (without water)62,5832
Polymers62,4801
Non-polymers1031
Water181
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
Unit cell
Length a, b, c (Å)76.501, 109.924, 214.309
Angle α, β, γ (deg.)90, 100.255, 90
Int Tables number4
Space group name H-MP1211
Noncrystallographic symmetry (NCS)NCS domain:
IDEns-IDDetails
11A
21A
32A
42A
53A
63A
74A
84A
95A
105A
116A
126A
137A
147A
158A
168A
179A
189A
1910A
2010A
2111A
2211A
2312A
2412A
2513A
2613A
2714A
2814A
2915A
3015A

NCS domain segments:

Auth asym-ID: A / Label asym-ID: A

Dom-IDComponent-IDEns-IDBeg auth comp-IDBeg label comp-IDEnd auth comp-IDEnd label comp-IDAuth seq-IDLabel seq-ID
111GLUGLULEULEU8 - 5648 - 562
211GLUGLULEULEU8 - 5648 - 562
322HISHISVALVAL7 - 5657 - 563
422HISHISVALVAL7 - 5657 - 563
533GLUGLULEULEU8 - 5648 - 562
633GLUGLULEULEU8 - 5648 - 562
744HISHISLEULEU7 - 5647 - 562
844HISHISLEULEU7 - 5647 - 562
955HISHISLEULEU7 - 5647 - 562
1055HISHISLEULEU7 - 5647 - 562
1166GLUGLUTRPTRP8 - 5638 - 561
1266GLUGLUTRPTRP8 - 5638 - 561
1377GLUGLULEULEU8 - 5648 - 562
1477GLUGLULEULEU8 - 5648 - 562
1588GLUGLULEULEU8 - 5648 - 562
1688GLUGLULEULEU8 - 5648 - 562
1799GLUGLULEULEU8 - 5648 - 562
1899GLUGLULEULEU8 - 5648 - 562
191010GLUGLULEULEU8 - 5648 - 562
201010GLUGLULEULEU8 - 5648 - 562
211111HISHISLEULEU7 - 5647 - 562
221111HISHISLEULEU7 - 5647 - 562
231212HISHISTRPTRP7 - 5637 - 561
241212HISHISTRPTRP7 - 5637 - 561
251313GLUGLULEULEU8 - 5648 - 562
261313GLUGLULEULEU8 - 5648 - 562
271414GLUGLULEULEU8 - 5648 - 562
281414GLUGLULEULEU8 - 5648 - 562
291515HISHISLEULEU7 - 5647 - 562
301515HISHISLEULEU7 - 5647 - 562

NCS ensembles :
IDDetails
1Local NCS retraints between domains: 1 2
2Local NCS retraints between domains: 3 4
3Local NCS retraints between domains: 5 6
4Local NCS retraints between domains: 7 8
5Local NCS retraints between domains: 9 10
6Local NCS retraints between domains: 11 12
7Local NCS retraints between domains: 13 14
8Local NCS retraints between domains: 15 16
9Local NCS retraints between domains: 17 18
10Local NCS retraints between domains: 19 20
11Local NCS retraints between domains: 21 22
12Local NCS retraints between domains: 23 24
13Local NCS retraints between domains: 25 26
14Local NCS retraints between domains: 27 28
15Local NCS retraints between domains: 29 30

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Components

#1: Protein
ABC transporter substrate-binding protein, Circular permuted superfolder GFP fusion


Mass: 62480.246 Da / Num. of mol.: 6
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) synthetic construct (others) / Production host: Escherichia coli (E. coli)
#2: Chemical
ChemComp-ABU / GAMMA-AMINO-BUTANOIC ACID / GAMMA(AMINO)-BUTYRIC ACID


Mass: 103.120 Da / Num. of mol.: 6 / Source method: obtained synthetically / Formula: C4H9NO2 / Feature type: SUBJECT OF INVESTIGATION
#3: Water ChemComp-HOH / water


Mass: 18.015 Da / Num. of mol.: 32 / Source method: isolated from a natural source / Formula: H2O
Has ligand of interestY
Has protein modificationY

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Experimental details

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Experiment

ExperimentMethod: X-RAY DIFFRACTION / Number of used crystals: 1

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Sample preparation

CrystalDensity Matthews: 2.47 Å3/Da / Density % sol: 50.29 %
Crystal growTemperature: 298 K / Method: vapor diffusion, hanging drop
Details: 0.2 M Ammonium formate, 20% w/v Polyethylene glycol 3,350

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Data collection

DiffractionMean temperature: 100 K / Serial crystal experiment: N
Diffraction sourceSource: SYNCHROTRON / Site: ALS / Beamline: 8.2.1 / Wavelength: 0.999969 Å
DetectorType: DECTRIS EIGER2 S 9M / Detector: PIXEL / Date: Dec 21, 2021
RadiationProtocol: SINGLE WAVELENGTH / Monochromatic (M) / Laue (L): M / Scattering type: x-ray
Radiation wavelengthWavelength: 0.999969 Å / Relative weight: 1
ReflectionResolution: 2.6→48.74 Å / Num. obs: 105803 / % possible obs: 98.5 % / Redundancy: 3.6 % / CC1/2: 0.994 / Rmerge(I) obs: 0.067 / Rpim(I) all: 0.063 / Rrim(I) all: 0.092 / Net I/σ(I): 11
Reflection shellResolution: 2.6→2.64 Å / Redundancy: 3.8 % / Rmerge(I) obs: 0.434 / Num. unique obs: 5388 / CC1/2: 0.809 / Rpim(I) all: 0.399 / Rrim(I) all: 0.591 / % possible all: 99.9

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Processing

Software
NameVersionClassification
REFMAC5.8.0425refinement
XDSdata reduction
Aimlessdata scaling
MOLREPphasing
RefinementMethod to determine structure: MOLECULAR REPLACEMENT / Resolution: 2.6→47.39 Å / Cor.coef. Fo:Fc: 0.94 / Cor.coef. Fo:Fc free: 0.912 / SU B: 26.641 / SU ML: 0.251 / Cross valid method: FREE R-VALUE / ESU R Free: 0.328 / Details: Hydrogens have not been used
RfactorNum. reflection% reflectionSelection details
Rfree0.2493 5396 5.102 %Random
Rwork0.2061 100372 --
all0.208 ---
obs-105768 98.317 %-
Solvent computationIon probe radii: 0.8 Å / Shrinkage radii: 0.8 Å / VDW probe radii: 1.2 Å / Solvent model: MASK BULK SOLVENT
Displacement parametersBiso mean: 50.554 Å2
Baniso -1Baniso -2Baniso -3
1-0.386 Å20 Å2-0.103 Å2
2--0.512 Å20 Å2
3----0.808 Å2
Refinement stepCycle: LAST / Resolution: 2.6→47.39 Å
ProteinNucleic acidLigandSolventTotal
Num. atoms24518 0 42 32 24592
Refine LS restraints
Refine-IDTypeDev idealDev ideal targetNumber
X-RAY DIFFRACTIONr_bond_refined_d0.0070.01225160
X-RAY DIFFRACTIONr_angle_refined_deg1.611.79734287
X-RAY DIFFRACTIONr_dihedral_angle_1_deg6.78253202
X-RAY DIFFRACTIONr_dihedral_angle_2_deg6.035125
X-RAY DIFFRACTIONr_dihedral_angle_3_deg14.114103717
X-RAY DIFFRACTIONr_dihedral_angle_6_deg13.863101085
X-RAY DIFFRACTIONr_chiral_restr0.120.23779
X-RAY DIFFRACTIONr_gen_planes_refined0.0070.0219873
X-RAY DIFFRACTIONr_nbd_refined0.2290.29545
X-RAY DIFFRACTIONr_nbtor_refined0.3080.216882
X-RAY DIFFRACTIONr_xyhbond_nbd_refined0.1280.2681
X-RAY DIFFRACTIONr_symmetry_nbd_refined0.2920.271
X-RAY DIFFRACTIONr_symmetry_xyhbond_nbd_refined0.2730.25
X-RAY DIFFRACTIONr_mcbond_it4.3634.06912886
X-RAY DIFFRACTIONr_mcangle_it6.4427.30416058
X-RAY DIFFRACTIONr_scbond_it5.5414.21912274
X-RAY DIFFRACTIONr_scangle_it8.0337.61618229
X-RAY DIFFRACTIONr_lrange_it9.72240.95735172
X-RAY DIFFRACTIONr_ncsr_local_group_10.0690.0516738
X-RAY DIFFRACTIONr_ncsr_local_group_20.0640.0517004
X-RAY DIFFRACTIONr_ncsr_local_group_30.0770.0516469
X-RAY DIFFRACTIONr_ncsr_local_group_40.0770.0516463
X-RAY DIFFRACTIONr_ncsr_local_group_50.0690.0516518
X-RAY DIFFRACTIONr_ncsr_local_group_60.0680.0516482
X-RAY DIFFRACTIONr_ncsr_local_group_70.0690.0516162
X-RAY DIFFRACTIONr_ncsr_local_group_80.0740.0516060
X-RAY DIFFRACTIONr_ncsr_local_group_90.0720.0516100
X-RAY DIFFRACTIONr_ncsr_local_group_100.0740.0516303
X-RAY DIFFRACTIONr_ncsr_local_group_110.0750.0516289
X-RAY DIFFRACTIONr_ncsr_local_group_120.0730.0516349
X-RAY DIFFRACTIONr_ncsr_local_group_130.0780.0515894
X-RAY DIFFRACTIONr_ncsr_local_group_140.0750.0516029
X-RAY DIFFRACTIONr_ncsr_local_group_150.0770.0515886
Refine LS restraints NCS
Ens-IDDom-IDAuth asym-IDRefine-IDTypeRms dev position (Å)Weight position
11AX-RAY DIFFRACTIONLocal ncs0.068730.0501
12AX-RAY DIFFRACTIONLocal ncs0.068730.0501
23AX-RAY DIFFRACTIONLocal ncs0.064240.0501
24AX-RAY DIFFRACTIONLocal ncs0.064240.0501
35AX-RAY DIFFRACTIONLocal ncs0.077310.05009
36AX-RAY DIFFRACTIONLocal ncs0.077310.05009
47AX-RAY DIFFRACTIONLocal ncs0.077420.0501
48AX-RAY DIFFRACTIONLocal ncs0.077420.0501
59AX-RAY DIFFRACTIONLocal ncs0.069450.0501
510AX-RAY DIFFRACTIONLocal ncs0.069450.0501
611AX-RAY DIFFRACTIONLocal ncs0.068160.0501
612AX-RAY DIFFRACTIONLocal ncs0.068160.0501
713AX-RAY DIFFRACTIONLocal ncs0.068740.05009
714AX-RAY DIFFRACTIONLocal ncs0.068740.05009
815AX-RAY DIFFRACTIONLocal ncs0.074170.05009
816AX-RAY DIFFRACTIONLocal ncs0.074170.05009
917AX-RAY DIFFRACTIONLocal ncs0.072180.0501
918AX-RAY DIFFRACTIONLocal ncs0.072180.0501
1019AX-RAY DIFFRACTIONLocal ncs0.073820.05009
1020AX-RAY DIFFRACTIONLocal ncs0.073820.05009
1121AX-RAY DIFFRACTIONLocal ncs0.075240.0501
1122AX-RAY DIFFRACTIONLocal ncs0.075240.0501
1223AX-RAY DIFFRACTIONLocal ncs0.073220.0501
1224AX-RAY DIFFRACTIONLocal ncs0.073220.0501
1325AX-RAY DIFFRACTIONLocal ncs0.078210.05009
1326AX-RAY DIFFRACTIONLocal ncs0.078210.05009
1427AX-RAY DIFFRACTIONLocal ncs0.074630.05009
1428AX-RAY DIFFRACTIONLocal ncs0.074630.05009
1529AX-RAY DIFFRACTIONLocal ncs0.076650.05009
1530AX-RAY DIFFRACTIONLocal ncs0.076650.05009
LS refinement shell

Refine-ID: X-RAY DIFFRACTION / Total num. of bins used: 20

Resolution (Å)Rfactor RfreeNum. reflection RfreeRfactor RworkNum. reflection RworkRfactor allNum. reflection allFsc freeFsc work% reflection obs (%)WRfactor Rwork
2.6-2.6670.3414310.28874860.29179260.930.95599.88640.279
2.667-2.740.3374190.2873150.28377430.9390.9699.88380.268
2.74-2.8190.3083790.27970640.2874510.9480.95999.89260.263
2.819-2.9060.3163660.25469030.25772790.9370.96399.86260.236
2.906-3.0010.2863160.23366800.23670180.9530.96999.68650.216
3.001-3.1060.2863530.23164690.23368460.9480.96799.64940.215
3.106-3.2220.2643090.22362480.22565870.9560.96999.54460.21
3.222-3.3530.2613370.22659790.22863840.9560.9798.93480.216
3.353-3.5020.2923300.23356200.23660420.950.97198.47730.225
3.502-3.6710.282500.22854590.2358300.9610.97497.92450.224
3.671-3.8690.2663130.22350830.22655370.9590.97597.45350.22
3.869-4.1020.2192720.18647690.18852600.9740.98295.83650.187
4.102-4.3830.1852280.15345150.15549650.980.98895.52870.158
4.383-4.730.1842030.13941770.14145960.9810.98895.30030.148
4.73-5.1770.1822020.14838740.14942610.9810.98795.65830.158
5.177-5.7790.2472230.18335030.18738520.9660.98396.7290.194
5.779-6.6570.2731500.21831850.2234240.9610.97797.40070.23
6.657-8.1130.2791390.21726840.2228950.9580.97697.5130.237
8.113-11.3090.1391000.1521280.14923030.9850.98696.74340.173
11.309-47.390.248760.26612320.26513570.9490.9596.38910.293
Refinement TLS params.

Method: refined / Refine-ID: X-RAY DIFFRACTION

IDL112)L122)L132)L222)L232)L332)S11 (Å °)S12 (Å °)S13 (Å °)S21 (Å °)S22 (Å °)S23 (Å °)S31 (Å °)S32 (Å °)S33 (Å °)T112)T122)T132)T222)T232)T332)Origin x (Å)Origin y (Å)Origin z (Å)
10.2241-0.09720.05250.0781-0.17070.6489-0.0681-0.0015-0.07190.0489-0.00130.0015-0.1032-0.00810.06950.0327-0.00730.00480.05050.02010.09125.7531-3.059366.4436
20.53390.25420.10390.2827-0.14820.33860.02730.02840.02050.0342-0.072-0.01550.01460.07550.04470.0202-0.02010.00210.06850.03440.06133.131142.609736.1873
30.5360.0391-0.07860.19260.04450.1377-0.07450.03530.0927-0.00710.05360.00260.02890.02490.02080.085-0.0036-0.02510.03960.00550.032544.004145.136274.3385
40.43510.32830.11510.4132-0.01790.1786-0.01890.08040.0947-0.02250.0050.1480.01490.14320.01390.02140.00320.00250.13280.02520.071718.392541.0144-0.4791
50.1879-0.0623-0.09580.2885-0.19420.24610.0292-0.01770.0108-0.0780.05670.0510.0588-0.034-0.08590.09850.0037-0.10160.0206-0.0150.1204-4.1619-15.454935.4273
60.0213-0.0068-0.01270.1796-0.46961.2975-0.01280.0053-0.03930.13750.00690.0087-0.3261-0.06610.00590.1478-0.0155-0.01880.02050.0070.0893-0.25151.5153105.0779
Refinement TLS groupSelection: ALL

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