8EYZ

Engineered glutamine binding protein bound to GLN and a cobaloxime ligand

• PDB DOI: https://doi.org/10.2210/pdb8EYZ/pdb

• Classification: METAL BINDING PROTEIN
• Organism(s): Escherichia coli
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): Yes 


• Deposited: 2022-10-29 Released: 2022-11-23 
• Deposition Author(s): Bridwell-Rabb, J., Boggs, D.G., Olshansky, L., Fatima, S., Thompson, P.
• Funding Organization(s): National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.99 Å
• R-Value Free: 0.266 
• R-Value Work: 0.233 
• R-Value Observed: 0.236 

Starting Model: experimental

Literature

Engineering a Conformationally Switchable Artificial Metalloprotein.

Fatima, S., Boggs, D.G., Ali, N., Thompson, P.J., Thielges, M.C., Bridwell-Rabb, J., Olshansky, L.

(2022) J Am Chem Soc 144: 21606-21616

• PubMed: 36378237 
• DOI: https://doi.org/10.1021/jacs.2c08885
• Primary Citation of Related Structures:  
  8EYZ


• PubMed Abstract: 
  

  Many naturally occurring metalloenzymes are gated by rate-limiting conformational changes, and there exists a critical interplay between macroscopic structural rearrangements of the protein and subatomic changes affecting the electronic structure of embedded metallocofactors. Despite this connection, most artificial metalloproteins (ArMs) are prepared in structurally rigid protein hosts. To better model the natural mechanisms of metalloprotein reactivity, we have developed conformationally switchable ArMs (swArMs) that undergo a large-scale structural rearrangement upon allosteric effector binding. The swArMs reported here contain a Co(dmgH) ₂ (X) cofactor (dmgH = dimethylglyoxime and X = N ₃ ^- , H ₃ C ^- , and ⁱ Pr ^- ). We used UV-vis absorbance and energy-dispersive X-ray fluorescence spectroscopies, along with protein assays, and mass spectrometry to show that these metallocofactors are installed site-specifically and stoichiometrically via direct Co-S cysteine ligation within the Escherichia coli glutamine binding protein (GlnBP). Structural characterization by single-crystal X-ray diffraction unveils the precise positioning and microenvironment of the metallocofactor within the protein fold. Fluorescence, circular dichroism, and infrared spectroscopies, along with isothermal titration calorimetry, reveal that allosteric Gln binding drives a large-scale protein conformational change. In swArMs containing a Co(dmgH) ₂ (CH ₃ ) cofactor, we show that the protein stabilizes the otherwise labile Co-S bond relative to the free complex. Kinetics studies performed as a function of temperature and pH reveal that the protein conformational change accelerates this bond dissociation in a pH-dependent fashion. We present swArMs as a robust platform for investigating the interplay between allostery and metallocofactor regulation.

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Organizational Affiliation: 

Department of Chemistry, University of Illinois Urbana-Champaign, 600 S. Mathews Avenue, Urbana, Illinois61801, United States.

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors.

Biological Assembly Evidence: homology

Biological Assembly 2  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 2 assigned by authors.

Biological Assembly 3  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 3 assigned by authors.

Biological Assembly 4  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 4 assigned by authors.

Biological Assembly 5  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 5 assigned by authors.

Biological Assembly 6  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 6 assigned by authors.

Biological Assembly 7  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 7 assigned by authors.

Biological Assembly 8  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 8 assigned by authors.

Biological Assembly 9  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 9 assigned by authors.

Biological Assembly 10  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 10 assigned by authors.

Biological Assembly 11  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 11 assigned by authors.

Biological Assembly 12  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 12 assigned by authors.

Macromolecule Content

• Total Structure Weight: 311.11 kDa 
• Atom Count: 21,269 
• Modelled Residue Count: 2,666 
• Deposited Residue Count: 2,748 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Amino acid ABC transporter substrate-binding protein	A, B, C, D, E, F, G, H, I, J, K, L	229	Escherichia coli	Mutation(s): 2  Gene Names:  glnH, A5U30_004091, A6592_04880, A8499_000176, A9X72_16950, AAG43_003583, ACN68_16860, ACN81_02400, ACU57_05845, AF998_000125, AM464_21485, APX88_17575, AT335_000554, AT845_002764, AW118_24500, AW119_03915, AWP47_29145, B6R12_003536, B6R15_002883, B6R31_003222, B6R48_003973, B6R87_003886, BANRA_01322, BANRA_01764, BEA19_14205, BER14_07540, BF481_003043, BG944_004267, BGM66_000966, BHS81_04935, BJI68_11495, BJJ90_17825, BK292_21345, BK383_19105, BLM69_000575, BMC79_000611, BMT49_05685, BMT50_00560, BMT91_20520, BN17_06101, BO068_000746, BOH76_16995, BON63_24725, BON64_24190, BON65_04740, BON66_07455, BON67_25290, BON68_02720, BON69_08400, BON70_24775, BON71_14305, BON72_22420, BON73_01195, BON74_14830, BON75_15470, BON76_25420, BON77_09375, BON78_20655, BON79_20060, BON80_12630, BON81_19085, BON82_15305, BON83_05500, BON84_13940, BON86_21740, BON87_16800, BON88_07465, BON89_22820, BON90_14295, BON91_21900, BON92_22285, BON93_04225, BON94_25770, BON95_05775, BON96_27115, BON97_10525, BON98_19710, BR158_002878, BRV02_000648, BSR05_11095, BTB68_001717, BTQ06_26205, BUO55_004168, BvCmsF30A_02312, BvCmsHHP019_04964, BvCmsKKP061_03133, BvCmsKSNP073_02686, BVL39_24445, BXT93_09325, BZL69_00955, C0P57_004641, C1Q91_004053, C2121_002453, C2M16_01565, C2R31_002978, C2U48_05980, C3F40_08525, C5N07_02720, C5Y87_11455, C9114_21285, C9160_24490, C9E67_21255, C9Z68_13890, CA593_25060, CCS08_19690, CCV12_002704, CDC27_03365, CDL36_05995, CDL37_06170, CF22_003152, CG831_000699, CHM61_001352, CIG67_24135, CO706_26845, CQ986_002219, CR538_17365, CR539_08495, CR628_003110, CTR35_001347, CV83915_00768, CWS33_06680, CX938_000617, CXJ73_000498, CY655_04230, D0X26_05085, D1912_20655, D1H34_001169, D3822_09995, D3C88_05045, D3G36_03255, D3Y67_17015, D4N09_12520, D4U49_00030, D9D43_04855, D9D77_09815, D9E34_09280, D9E49_16110, D9H94_11690, D9J03_11000, D9J61_05355, DAH17_03825, DAH18_19240, DAH19_07490, DAH20_21020, DAH21_16625, DAH22_20195, DAH23_12545, DAH24_12625, DAH25_13880, DAH26_12570, DAH27_27195, DAH28_26570, DAH29_21215, DAH30_24830, DAH31_23660, DAH32_25755, DAH33_16740, DAH34_00565, DAH35_19590, DAH36_01785, DAH37_00035, DAH38_23920, DAH40_16855, DAH41_26115, DAH42_14420, DAH43_13740, DAH45_14115, DAH46_16030, DAH47_10645, DAH48_08930, DAH49_15255, DAH50_02775, DD762_19985, DEN86_16580, DEN87_25365, DEN88_18460, DEN89_18240, DEN90_15895, DEN91_18520, DEN92_25370, DEN93_25685, DEN94_25170, DEN95_25645, DEN96_14460, DEN97_05945, DEN98_14610, DEN99_03305, DEO00_15605, DEO01_16930, DEO02_15845, DEO03_02745, DEO04_17445, DEO05_17315, DEO06_16065, DEO07_16850, DEO08_10875, DEO09_17170, DEO10_17430, DEO11_17320, DEO12_17235, DEO13_25310, DEO14_25015, DEO15_18570, DEO17_18420, DEO18_14095, DEO19_25855, DEO20_09480, DIV22_24420, DKP82_24310, DM870_16080, DN627_03140, DNX30_21735, DRW19_18320, DS732_09030, DTL43_10730, DTL90_03445, DTM45_05760, DU321_00670, DXT69_17235, DXT70_03865, DXT71_08710, DXT73_10050, E0I42_20880, E2112_02675, E2113_01945, E2114_18730, E2115_17055, E2116_04330, E2117_24095, E2118_16300, E2119_12420, E2120_04215, E2121_18185, E2122_15175, E2123_15570, E2124_10840, E2125_18565, E2127_00470, E2128_04955, E2129_10405, E2130_05520, E2131_16230, E2132_01450, E2133_04840, E2134_04965, E2135_16085, E2136_14980, E2646_20010, E3O05_01530, E4K51_02810, E4T14_00550, E4T84_17465, E5H86_25390, E5M02_22525, E5P22_03440, E5P23_09650, E5P24_07820, E5P25_14380, E5P26_02375, E5P27_03730, E5P28_05135, E5P29_02255, E5P30_11875, E5P31_05030, E5P32_00405, E5P33_13470, E5P34_03095, E5P35_02485, E5P36_15665, E5P37_20315, E5P39_19970, E5P40_02695, E5P41_16665, E5P42_12050, E5P43_17005, E5P44_18530, E5P45_22380, E5P46_16045, E5P47_19935, E5P48_15405, E5P49_19430, E5P50_22740, E5P51_16920, E5S34_18760, E5S35_18835, E5S36_04930, E5S37_23235, E5S38_16415, E5S39_18510, E5S43_19010, E5S44_19440, E5S45_23380, E5S46_22040, E5S47_18610, E5S48_18775, E5S51_14615, E5S52_10650, E5S53_16880, E5S54_25355, E5S55_16870, E5S56_20090, E5S57_09335, E5S58_12745, E5S61_14780, E5S62_04320, E6C80_01100, E6D34_16620, EA239_02055, EA435_03075, EAI46_17535, EAN77_08520, EAX79_16230, EC1094V2_3069, EC95NR1_05084, ECs0889, ED648_06680, EHD79_17160, EI021_00555, EIA08_01310, EIZ93_04910, EKI52_06410, EL79_3071, EL80_3032, ELT16_02415, ELT17_17330, ELT20_02820, ELT21_01480, ELT22_07560, ELT23_02015, ELT24_02785, ELT25_04925, ELT26_09185, ELT27_07495, ELT28_15430, ELT29_09190, ELT30_04155, ELT31_02235, ELT32_01320, ELT33_01125, ELT34_02155, ELT35_01150, ELT36_07860, ELT38_02015, ELT39_12720, ELT40_06625, ELT41_10995, ELT44_00485, ELT45_07655, ELT46_05645, ELT48_02765, ELT49_11575, ELT50_00370, ELT51_04720, ELT52_01735, ELT54_03790, ELT55_02630, ELT56_04370, ELT58_13405, ELT59_01975, ELT60_02685, ELT61_00525, ELT63_00400, ELT72_09395, ELU07_01290, ELU82_01275, ELU83_00030, ELU85_01090, ELU88_02755, ELU89_06090, ELU90_16660, ELU91_09660, ELU94_20245, ELU95_04135, ELU96_01710, ELU97_02075, ELU98_07325, ELU99_17975, ELV00_00990, ELV01_02685, ELV02_04500, ELV03_02685, ELV04_09130, ELV05_01070, ELV07_02685, ELV08_05490, ELV09_09705, ELV10_03635, ELV11_00495, ELV12_17700, ELV13_05135, ELV15_08005, ELV16_06920, ELV20_01690, ELV21_07280, ELV22_03390, ELV23_04940, ELV26_19830, ELV28_13395, ELV29_14030, ELV40_13070, ELX48_20960, ELX61_08885, ELX66_13645, ELX68_03535, ELX69_04805, ELX76_06605, ELX79_08650, ELX85_04825, ELX96_24945, ELY02_21695, ELY32_15660, ELY36_07870, ELY39_10000, ELY41_22740, ELY48_10875, EN85_004581, ERS085406_04011, ERS139208_02685, EWK56_11475, ExPECSC038_02876, EXX13_17615, EYV17_11920, EYV18_03835, F0L67_04275, F2N20_02135, F2N31_03410, F3N40_12265, F7F11_11485, F7N46_08470, F9413_07780, F9461_01305, F9B07_02710, F9S83_08475, F9V24_04485, F9X20_12650, FDM60_08540, FE584_14605, FE587_14715, FEJ01_13600, FFF58_04660, FGG80_18845, FHO90_02740, FHQ91_05095, FIJ20_11900, FJQ40_17745, FJQ51_03360, FJQ53_08590, FKO60_07285, FOI11_009340, FOI11_10705, FPI65_04950, FPJ29_13820, FPS11_01585, FQF29_02765, FV293_02200, FVB16_07150, FWK02_14955, FY127_05225, FZC17_24290, FZN31_16475, FZU14_07000, G3813_001838, G3V95_03410, G3W53_12740, G4A38_09725, G4A47_02555, G5603_02180, G7630_000206, G9448_06715, GAI66_11760, GAI89_13630, GAJ12_17235, GAJ26_02185, GF147_05165, GF699_09700, GFY34_01840, GIB53_03185, GJ11_04510, GJO56_05855, GKF66_09425, GKF89_13835, GNW61_02415, GNZ05_09120, GOP25_10140, GP711_00870, GP944_02795, GP965_17210, GP979_15650, GQM04_08380, GQM13_17840, GQM21_08920, GQN34_06325, GQW07_06480, GQW68_09320, GQW80_16390, GRC73_03245, GRO95_00200, GRW05_01550, GRW24_15895, GRW56_11730, GRW57_13110, GSM54_17415, GSY44_21500, GTP88_11170, GUC01_03260, GUI33_12255, H0O37_11575, H0O39_10830, H0O72_02630, HEP30_007075, HEP34_000682, HHH44_004674, HI055_001651, HIE29_000308, HIN64_003897, HJQ60_003183, HJU54_001291, HKA49_004171, HL563_07185, HL601_10425, HLV18_05320, HLX92_21635, HLZ50_00225, HmCms169_02183, HMJ82_04430, HMV95_02550, HMW38_01730, HNC36_00575, HNC59_02155, HNC66_13445, HNC99_06490, HND12_01310, HV109_16015, HV209_04855, HVV39_21020, HVW04_06960, HVW19_18030, HVW43_08305, HVY77_17775, HVZ71_16640, HX136_17495, I6H00_09980, I6H01_21610, I6H02_22350, IA00_002027, IFB95_003951, IH768_00950, IH772_11995, IT029_003785, J0541_000988, J4S20_005071, J5U05_002124, JE86ST02C_09210, JE86ST05C_09750, JFD_02409, JNP96_08670, NCTC10082_05067, NCTC10089_03418, NCTC10090_00382, NCTC10418_05048, NCTC10429_05756, NCTC10865_04252, NCTC11181_00607, NCTC12950_03687, NCTC13127_04610, NCTC13216_03355, NCTC4450_03842, NCTC7922_06781, NCTC7927_03810, NCTC7928_05513, NCTC8008_02951, NCTC8009_06196, NCTC8179_02263, NCTC8333_03962, NCTC8450_01827, NCTC8500_03700, NCTC8621_03555, NCTC8959_00379, NCTC8960_00488, NCTC9001_01370, NCTC9036_03440, NCTC9037_03540, NCTC9075_04560, NCTC9111_03455, NCTC9702_03882, NCTC9706_00702, NCTC9775_01675, NCTC9777_03409, NCTC9962_02368, ND22_002874, RG28_00455, SAMEA3472044_00248, SAMEA3472056_00231, SAMEA3472147_02754, SAMEA3751407_00314, SAMEA3752557_02233, SAMEA3753106_00906, TUM18780_29030, WP4S18E07_30170, WR15_25350, XU56_002013
UniProt
Find proteins for P0AEQ3 (Escherichia coli (strain K12)) Explore P0AEQ3  Go to UniProtKB:  P0AEQ3

Small Molecules

Ligands 4 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
X5Z (Subject of Investigation/LOI)	AA [auth E], CA [auth F], FA [auth G], KA [auth H], M [auth A], MA [auth I], Q [auth B], QA [auth J], RA [auth K], T [auth C], TA [auth L], W [auth D]	AZIDOBIS (DIMETHYLGLYOXIMATO) PYRIDINECOBALT C15 H23 Co N8 O4 KKXSWROVWVQWSY-GLPMUSQESA-N
GLN	BA [auth E], EA [auth F], JA [auth G], LA [auth H], NA [auth I], P [auth A], PA [auth J], S [auth B], SA [auth K], UA [auth L], V [auth C], Z [auth D]	GLUTAMINE C5 H10 N2 O3 ZDXPYRJPNDTMRX-VKHMYHEASA-N
SO4	GA [auth G], HA [auth G], IA [auth G], N [auth A], O [auth A], OA [auth J], R [auth B], U [auth C]	SULFATE ION O4 S QAOWNCQODCNURD-UHFFFAOYSA-L
GOL	DA [auth F], X [auth D], Y [auth D]	GLYCEROL C3 H8 O3 PEDCQBHIVMGVHV-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.99 Å
• R-Value Free: 0.266 
• R-Value Work: 0.233 
• R-Value Observed: 0.236 
• Space Group: P 1 2₁ 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 75.125	α = 90
b = 136.091	β = 90.16
c = 150.98	γ = 90

Software Package:

Software Name	Purpose
PHENIX	refinement
XDS	data reduction
XDS	data scaling
PHASER	phasing

Structure Validation

Entry History & Funding Information

Deposition Data

• Released Date: 2022-11-23 
Deposition Author(s): Bridwell-Rabb, J., Boggs, D.G., Olshansky, L., Fatima, S., Thompson, P.

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Funding Organization	Location	Grant Number
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)	United States	GM138138

Revision History  

• Version 1.0: 2022-11-23
  Type: Initial release
  
• Version 1.1: 2022-12-07
  Changes: Database references
• Version 1.2: 2023-10-25
  Changes: Data collection, Refinement description
• Version 2.0: 2024-02-14
  Changes: Advisory, Data collection, Derived calculations, Non-polymer description, Structure summary