Biological Assembly 1  

 3D View: Structure | Electron Density | Ligand Interaction

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

Biological assembly 1 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 12.58 kDa 
• Atom Count: 772 
• Residue Count: 95 
• Unique protein chains: 1

2XSK

E. coli curli protein CsgC - SeCys

• DOI: 10.2210/pdb2XSK/pdb

• Classification: CHAPERONE
• Organism(s): Escherichia coli
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): No 


• Deposited: 2010-09-29 Released: 2010-12-29 
• Deposition Author(s): Salgado, P.S., Taylor, J.D., Cota, E., Matthews, S.J.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.70 Å
• R-Value Free: 0.285 
• R-Value Work: 0.237 
• R-Value Observed: 0.239 

Literature

Extending the Usability of the Phasing Power of Diselenide Bonds: Secys Sad Phasing of Csgc Using a Non-Auxotrophic Strain.

Salgado, P.S., Taylor, J.D., Cota, E., Matthews, S.J.

(2011) Acta Crystallogr D Biol Crystallogr 67: 8

• PubMed: 21206057 
• DOI: 10.1107/S0907444910042022
• Primary Citation of Related Structures:  
  2XSK


• PubMed Abstract: 
  

The CsgC protein is a component of the curli system in Escherichia coli. Reported here is the successful incorporation of selenocysteine (SeCys) and selenomethionine (SeMet) into recombinant CsgC, yielding derivatized crystals suitable for structural determination. Unlike in previous reports, a standard autotrophic expression strain was used and only single-wavelength anomalous dispersion (SAD) data were required for successful phasing. The level of SeCys/SeMet incorporation was estimated by mass spectrometry to be about 80%. The native protein crystallized in two different crystal forms (form 1 belonging to space group C222(1) and form 2 belonging to space group C2), which diffracted to 2.4 and 2.0 Å resolution, respectively, whilst Se-derivatized protein crystallized in space group C2 and diffracted to 1.7 Å resolution. The Se-derivatized crystals are suitable for SAD structure determination using only the anomalous signal derived from the SeCys residues. These results extend the usability of SeCys labelling to more general and less favourable cases, rendering it a suitable alternative to traditional phasing approaches.

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Organizational Affiliation: 

Imperial College London, England.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
CSGC	A	110	Escherichia coli	Mutation(s): 0  Gene Names:  csgC, A6581_12740, A6592_16375, A9P13_10360, AM446_11355, AM465_20845, APT94_18920, ARC77_26215, AU473_14335, AWG78_002930, AWG90_007525, AWP75_16940, B6V57_05215, B9M99_12340, B9N33_05900, BE963_19475, BEN53_12935, BER14_09975, BFD68_04600, BHF03_21480, BIQ87_05835, BIU72_07180, BIZ41_17510, BK248_12160, BK334_17345, BK373_20065, BK375_13865, BK383_03890, BMT49_08125, BON65_06150, BON66_01485, BON83_06735, BON87_13855, BON92_25340, BTQ04_04865, BvCms35BK_05175, BvCmsKKP036_01082, BvCmsKSNP120_02365, BWI89_08845, BWP17_14785, BXT93_15915, C2M16_23360, C4K41_10720, C4M78_07770, C5P44_04365, C6B13_08350, C7B18_03685, C9E67_18420, C9Z29_00640, C9Z43_15810, C9Z68_07110, C9Z78_21280, CCZ14_13400, CCZ17_00580, CI693_26470, CR539_09885, CRE06_18240, CRT43_06005, CRX46_15790, CSB64_07090, CT146_19270, CUB99_01980, CVH05_20345, CWM24_09450, D1912_33485, D2188_13440, D3822_19565, D3C88_18225, D3M98_00675, D3P01_15285, D3P02_02060, D4011_17970, D4023_07950, D4074_16335, D4660_17185, D4L91_16405, D4M06_16710, D4M76_07285, D4U85_18060, D4V08_03945, D5I97_15490, D6C36_17385, D6D43_14525, D6X63_07285, D6X76_18400, D7K33_15230, D7K63_17845, D7K66_17195, D8Y65_15825, D9D31_20550, D9D33_18490, D9D43_12060, D9D94_00385, D9E34_24460, D9F17_21555, D9F32_18965, D9G11_14405, D9G48_06120, D9H36_09030, D9H53_08880, D9H70_10940, D9I88_11555, D9J03_24020, D9J46_00630, D9J58_06950, D9J60_07655, D9K02_20980, D9K54_26780, D9L89_17265, D9X77_14640, D9X97_17085, DAH26_20350, DAH43_19950, DB359_00855, DD762_03870, DEN86_25980, DL257_15635, DL455_07065, DLT82_11835, DLW88_12285, DLX40_02225, DM102_04795, DM129_00845, DM280_03095, DM962_14300, DMC44_22760, DMI04_15775, DMI53_16670, DMO02_18170, DMZ50_04855, DN627_14360, DN703_15860, DNB37_24520, DND16_21265, DNJ62_16615, DNK12_14555, DNR41_04675, DNX30_12390, DOE35_15395, DOS18_15860, DOT81_17535, DOU81_16175, DOY22_16985, DOY56_16725, DP258_00515, DQG35_17005, DRP48_17745, DS721_15610, DTL90_00140, DTM10_22445, DTM45_18560, DU309_26250, DU321_15300, DU333_10200, DWB25_09955, DXX80_023325, E0L04_00960, E0L12_08405, E2112_26995, E2114_04870, E2115_02490, E2148_05630, E5P37_16605, E5S58_14950, E5S61_09150, EA159_06040, EA164_05910, EA167_14310, EA174_15180, EA184_01250, EA189_03370, EA191_13860, EA203_04335, EA214_05330, EA218_17030, EA225_14465, EA231_22815, EA232_16670, EA233_14625, EA239_00695, EA247_02595, EA250_00675, EA429_10710, EA433_06465, EA435_18395, EA834_15690, EB509_13075, EB510_15310, EB515_17345, EBA84_18115, EBJ06_16650, ECONIH1_06440, ECs1421, ECTO124_03058, ED225_16585, ED607_11730, ED611_18180, ED903_08340, ED944_18255, EEA45_10615, EF082_00340, EF173_18830, EGT48_25040, EGU87_13685, EHD45_11805, EHD63_15855, EHJ66_17885, EHV81_19890, EHV90_12160, EHW09_12110, EHX09_07415, EIA08_02690, EIA21_07780, ELT17_05665, ELT48_03820, ELT49_14645, ELT58_01995, ELU82_14955, ELU85_21415, ELU96_17250, ELV00_02325, ELV13_08320, ELV15_03175, ELV22_05390, ELV24_13070, ELV28_02260, ELX56_02565, ELX70_14365, ELX76_11185, ELX79_00590, ELX83_19550, ELY23_14030, ELY24_16475, ELY41_02825, ELY48_17085, EO241_06530, EPS94_06650, EPU41_05455, EQ820_05220, EQ823_07120, EQ825_00085, EQ830_12595, ERL57_04200, ERS085383_03167, ERS085386_02372, EST51_15415, EXM29_11795, ExPECSC065_00669, EXX06_01100, EXX13_00870, EXX55_01345, EXX87_08865, EYX82_10830, EYX99_07810, EYY27_12695, EYY34_07030, F7F11_10550, F7G01_16465, F7G03_18320, F9050_10250, F9059_14655, F9B07_17130, FAF34_014530, FE846_17010, FNJ67_16425, FNJ69_02455, FNJ83_07515, FQ021_08500, FQU83_17010, FTV93_08715, FZC17_04155, FZN26_17750, FZN30_13860, G3565_06685, G5603_00825, G5608_00825, G5675_17790, G5696_17520, GII91_11910, GIJ01_16440, GIY13_11605, GIY19_00990, GJ11_06315, GJ638_07600, GJD97_17240, GKE15_15080, GKE16_15205, GKE22_14870, GKE24_15825, GKE26_15190, GKE29_13600, GKE31_16370, GKE39_14390, GKE46_15775, GKE53_13995, GKE58_13665, GKE60_14375, GKE64_13855, GKE69_13955, GKE77_13760, GKE79_13470, GKE87_08335, GKE93_07355, GKF00_10990, GKF03_04840, GKF21_06565, GKF28_05815, GKF34_06610, GKF47_06610, GKF52_05905, GN312_19815, GNZ00_13300, GNZ02_10565, GP700_15130, GP711_16255, GP712_08800, GP727_12075, GP892_12930, GP912_10870, GQA23_16620, GQE36_17375, GQE47_15885, GQE58_02280, GQE68_16900, GQE88_05625, GQM13_14560, GQN33_16505, GQS26_01770, GQY14_12170, GUB08_15735, GUC40_15635, GUI16_15750, GUI33_21545, GZS12_14515, HmCms169_01976, HmCmsJML074_04708, HmCmsJML146_03694, HmCmsJML204_04455, HmCmsJML236_02090, HMPREF3040_03136, MJ49_00950, MS6198_11760, MS8345_01028, NCTC10764_02702, NCTC10766_04498, NCTC10974_03468, NCTC13127_04120, NCTC13846_01987, NCTC8621_03286, NCTC9001_01075, NCTC9007_01927, NCTC9044_04341, NCTC9050_05290, NCTC9077_03828, NCTC9119_03143, NCTC9434_03600, NCTC9701_03323, NCTC9702_03637, NCTC9777_03097, SAMEA3472056_01749, SAMEA3472090_04712, SAMEA3472108_02252, SAMEA3472147_02307, SAMEA3484434_02959, SAMEA3485101_00242, SAMEA3752620_04468, SAMEA3753164_01765, SY51_05770, U12A_01109, U14A_01111, UC41_12650, YDC107_4300
Find proteins for B2CY50 (Escherichia coli) Explore B2CY50  Go to UniProtKB:  B2CY50

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
ACT	A	ACETATE ION C2 H3 O2 QTBSBXVTEAMEQO-UHFFFAOYSA-M

Modified Residues  1 Unique
ID	Chains	Type	Formula	2D Diagram	Parent
MSE	A	L-PEPTIDE LINKING	C5 H11 N O2 Se		MET

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.70 Å
• R-Value Free: 0.285 
• R-Value Work: 0.237 
• R-Value Observed: 0.239 
• Space Group: C 1 2 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 79.27	α = 90
b = 36.15	β = 117.09
c = 39.51	γ = 90

Software Package:

Software Name	Purpose
XDS	data reduction
XDS	data scaling
SHELX	phasing
PHASER	phasing
REFMAC	refinement

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2010-09-29 
• Released Date: 2010-12-29 
Deposition Author(s): Salgado, P.S., Taylor, J.D., Cota, E., Matthews, S.J.

Revision History 

• Version 1.0: 2010-12-29
  Type: Initial release
  
• Version 1.1: 2012-05-30
  Changes: Database references, Version format compliance
• Version 1.2: 2014-01-29
  Changes: Atomic model, Derived calculations, Non-polymer description, Other, Structure summary