6L7C

CsgFG complex with substrate CsgAN6 peptide in Curli biogenesis system

• PDB DOI: https://doi.org/10.2210/pdb6L7C/pdb
• EM Map EMD-0842: EMDB EMDataResource

• Classification: PROTEIN TRANSPORT
• Organism(s): Escherichia coli O69:H11 str. 08-4661, Escherichia coli, Escherichia coli K-12
• Expression System: Escherichia coli
• Mutation(s): No 
• Membrane Protein: Yes  OPMPDBTM


• Deposited: 2019-11-01 Released: 2020-01-15 
• Deposition Author(s): Yan, Z.F., Yin, M., Chen, J.N., Li, X.M.

---

Experimental Data Snapshot

• Method: ELECTRON MICROSCOPY
• Resolution: 3.34 Å
• Aggregation State: PARTICLE 
• Reconstruction Method: SINGLE PARTICLE 

Literature

Assembly and substrate recognition of curli biogenesis system.

Yan, Z., Yin, M., Chen, J., Li, X.

(2020) Nat Commun 11: 241-241

• PubMed: 31932609 
• DOI: https://doi.org/10.1038/s41467-019-14145-7
• Primary Citation of Related Structures:  
  6L7A, 6L7C


• PubMed Abstract: 
  

  A major component of bacterial biofilms is curli amyloid fibrils secreted by the curli biogenesis system. Understanding the curli biogenesis mechanism is critical for developing therapeutic agents for biofilm-related infections. Here we report a systematic study of the curli biogenesis system, highlighted by structural, biochemical and functional analysis of the secretion channel complexes (CsgF-CsgG) with and without the curli substrate. The dual-pore architecture of the CsgF-CsgG complex was observed and used to develop an approach to inhibit the curli secretion by physically reducing the size of the CsgF pore. We further elucidated the assembly of the CsgFG complex with curli components (CsgA and CsgB) and curli-cell association through CsgF. Importantly, the recognition of the CsgA substrate by CsgG was uncovered. Nine crevices outside of the CsgG channel provide specific and highly-conserved recognition sites for CsgA N-terminus. Together with analysis of CsgE, our study provides comprehensive insights into curli biogenesis.

---

Organizational Affiliation: 

Key Laboratory of Protein Sciences (Tsinghua University), Ministry of Education, Beijing, China.

Biological Assembly 1  

Global Symmetry: Cyclic - C9  (Explore in 3D)
Global Stoichiometry: Hetero 27-mer - A9B9C9 Pseudo Symmetry: Asymmetric - C1 
Pseudo Stoichiometry: Hetero 27-mer - A9B9C1D1E1F1G1H1I1J1K1 

Biological assembly 1 assigned by authors.

Biological Assembly Evidence: gel filtration

Macromolecule Content

• Total Structure Weight: 428.43 kDa 
• Atom Count: 20,601 
• Modelled Residue Count: 2,655 
• Deposited Residue Count: 3,933 
• Unique protein chains: 3

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Curli production assembly/transport protein CsgG	A, B, C, D, E, F, G, H, I	277	Escherichia coli O69:H11 str. 08-4661	Mutation(s): 0  Gene Names: BX06_26815 Membrane Entity: Yes
UniProt
Find proteins for P0AEA2 (Escherichia coli (strain K12)) Explore P0AEA2  Go to UniProtKB:  P0AEA2

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
CsgF	J, K, L, M, N, O, P, Q, R	138	Escherichia coli	Mutation(s): 0  Gene Names:  csgF, A6581_12775, A6592_16410, A8C65_09935, A8G17_17590, A8M42_01085, A9819_06490, A9R57_10355, AC789_1c11470, ACN002_1089, ACN81_09400, ACU57_27055, ACU90_19250, AJ318_00960, AKG99_07850, AM270_13185, AM464_23205, AMK83_16440, AML07_18510, APU18_12970, APZ14_01615, ARC77_26185, AU473_14305, AUQ13_23570, AUS26_14005, AW106_27240, AWE53_020770, AWF59_023705, AWG78_002955, AWP75_16905, AZZ83_000749, B1K96_25200, B7C53_12210, B9T59_24180, BANRA_01291, BANRA_01576, BANRA_01635, BANRA_04608, BB545_06045, BER14_09940, BHS81_06565, BHS87_05490, BIQ87_05800, BIU72_07215, BIZ41_17475, BJJ90_16050, BK292_02235, BK334_17375, BK373_20095, BK400_19610, BMT49_08095, BMT91_12220, BN17_09001, BON63_21540, BON66_00235, BON69_23620, BON76_26665, BON92_25375, BON93_01750, BTQ04_04830, BTQ06_28615, BUE81_01495, BvCms12BK_01199, BvCms2454_01967, BvCms35BK_05180, BvCmsA75A_03631, BvCmsF63A_02901, BvCmsH15A_03205, BvCmsHHP001_05125, BvCmsHHP019_01648, BvCmsHHP056_03328, BvCmsJ76A_01745, BvCmsKKP061_02124, BvCmsKSNP019_00536, BvCmsKSNP073_05115, BvCmsKSNP081_02155, BvCmsKSNP120_02370, BvCmsKSP008_00766, BvCmsKSP011_05236, BvCmsKSP015_04950, BvCmsKSP018_00729, BvCmsKSP024_02020, BvCmsKSP026_03242, BvCmsKSP036_02551, BvCmsKSP039_03584, BvCmsKSP040_00078, BvCmsKSP045_01294, BvCmsKSP054_01494, BvCmsKSP058_01099, BvCmsKSP061_05085, BvCmsKSP067_02664, BvCmsKSP076_00221, BvCmsKSP081_01991, BvCmsKSP083_04126, BvCmsNSNP006_00926, BvCmsNSNP023_01666, BvCmsNSNP027_01041, BvCmsNSNP036_01556, BvCmsNSP006_01448, BvCmsNSP007_03010, BvCmsNSP039_04491, BvCmsNSP045_01873, BvCmsNSP047_03188, BvCmsNSP052_01638, BvCmsNSP072_01737, BvCmsNSP078_01753, BvCmsOUP014_03127, BvCmsSINP011_02870, BvCmsSINP022_01393, BvCmsSINP036_02015, BvCmsSIP006_02579, BvCmsSIP010_04114, BvCmsSIP019_05011, BvCmsSIP044_01602, BVL39_23020, BW690_20185, BWP17_14750, C1I57_23660, C2M16_23325, C2U48_03735, C3449_22250, C4J69_16245, C4K41_10685, C5N07_21975, C5P01_13585, C5P43_18785, C5P44_04330, C6669_24200, C6986_06430, C6B13_08320, C7235_15270, C7B02_01110, C7B06_10030, C7B07_08350, C9025_13220, C9083_13050, C9200_05635, C9212_12645, C9255_16880, C9299_13245, C9E25_15565, C9E67_18455, C9Y80_08970, C9Y95_14355, C9Z12_15420, CA593_23315, CDL37_22840, CG692_25470, CI641_021185, CI694_24070, COD30_07495, COD46_11805, CQP61_11360, CR538_15905, CR539_09835, CRD98_09770, CRE06_18275, CRM83_09165, CSB64_07125, CT143_19775, CT146_19235, CVH05_20310, CWM24_09415, CWS33_22375, D0X26_23320, D1900_15070, D1912_33520, D2183_15675, D2184_16790, D2185_03375, D2F89_16725, D3821_20245, D3822_19530, D3C88_18190, D3O91_17020, D3Y67_15515, D4M06_16745, D7K63_17880, D7K66_17230, D7Y10_25390, D9D20_13510, D9E35_09110, D9G11_01800, D9G42_02010, D9H53_22330, D9H70_23200, D9H94_04555, D9I11_06735, D9I18_09120, D9I20_14875, D9I87_24110, D9I97_06115, D9J03_24045, D9J11_10875, D9J44_05170, D9K48_17895, D9K54_26755, D9L89_17300, D9L99_25015, D9X97_17120, DAH26_20385, DAH27_16630, DAH36_09625, DAH37_07515, DEN86_26015, DEN89_04050, DEO11_03635, DEO19_16190, DIV22_28760, DL455_07100, DL545_15180, DL800_08370, DMI04_15810, DNB37_24555, DNQ41_09265, DNR41_04640, DOY56_16760, DP258_00480, DQE83_00815, DQF57_17655, DQO13_15190, DS732_10230, DS966_20145, DTL43_16545, DTL90_00105, DTM10_22410, DTM25_02505, DU333_10225, DW236_07305, DXT71_23350, E0E06_19720, E2119_27400, E2132_08845, E2855_01310, E2863_01207, E5M00_13230, EAI42_03980, EAI46_03030, EAI52_09335, EB509_13100, EB510_15335, EB515_17370, EC3234A_26c00110, EC3426_01949, EC95NR1_05434, ECONIH1_06410, ECs1415, ECTO6_02921, ED225_16610, ED600_22300, ED607_11755, ED611_18205, ED648_24045, ED903_22580, ED944_18280, EEA45_10640, EEP23_24640, EF173_18855, EFV06_07775, EFV08_14150, EGY17_18935, EIA08_02665, EIA21_07755, EJC75_04035, EJH97_14750, EKI52_04095, EL75_2704, EL79_2739, EL80_2716, ELT33_12235, EO241_06505, EPS94_06625, EPS97_23230, EQ825_00060, ERL57_04175, ERS085365_03587, ERS085379_02716, ERS085383_03172, ERS085404_02838, ERS085406_01151, ERS085416_00210, ERS139211_03440, ERS150873_02816, ERS150876_03011, EVY21_12440, EWK56_19810, EXM29_11820, ExPECSC022_03109, ExPECSC038_03439, EXX06_01125, EXX13_00845, EXX23_16015, EXX24_14295, EXX53_14790, EXX55_01320, EXX71_17360, EXX78_02225, EXX87_08890, EYY78_26035, GJ11_06285, HmCms184_02447, HmCmsJML079_02982, HmCmsJML146_03699, HmCmsJML204_00878, HW43_08900, JD73_25430, MJ49_00980, MS6198_11710, MS8345_01023, NCTC10418_04583, NCTC10429_05442, NCTC10766_04503, NCTC10767_04990, NCTC11022_00191, NCTC11126_00990, NCTC11341_04818, NCTC13127_04125, NCTC13462_01067, NCTC7922_00566, NCTC7927_03442, NCTC8009_05720, NCTC8179_02810, NCTC8622_05879, NCTC8960_00713, NCTC8985_01811, NCTC9007_01932, NCTC9036_03192, NCTC9045_03609, NCTC9055_04891, NCTC9058_03886, NCTC9062_05238, NCTC9075_04088, NCTC9111_03151, NCTC9119_03148, NCTC9434_03595, NCTC9701_03328, NCTC9703_02363, NCTC9706_00463, NCTC9777_03104, NCTC9962_01914, NCTC9969_03241, PU06_15680, RG28_16620, RK56_002580, RX35_02724, SAMEA3472043_03793, SAMEA3472044_05359, SAMEA3472047_01444, SAMEA3472055_02534, SAMEA3472056_01744, SAMEA3472070_03172, SAMEA3472080_02978, SAMEA3472090_04886, SAMEA3472108_02247, SAMEA3472114_01584, SAMEA3472147_02312, SAMEA3484427_03684, SAMEA3484429_03764, SAMEA3485101_00247, SAMEA3485113_04376, SAMEA3752553_01957, SAMEA3752557_01505, SAMEA3752559_02004, SAMEA3752620_04473, SAMEA3753064_00899, SAMEA3753097_05333, SAMEA3753164_01770, SAMEA3753290_02723, SK85_01106, UN86_07965, UN91_14220, WQ89_17310, WR15_23585 Membrane Entity: Yes
UniProt
Find proteins for P0AE98 (Escherichia coli (strain K12)) Explore P0AE98  Go to UniProtKB:  P0AE98

Entity ID: 3
Molecule	Chains	Sequence Length	Organism	Details	Image
Major curlin subunit CsgA	AA [auth a], S, T, U, V, W, X, Y, Z	22	Escherichia coli K-12	Mutation(s): 0  Gene Names: csgA, FAZ80_15140, FAZ81_14840, FAZ83_14765, FAZ84_08025, FAZ86_15285 Membrane Entity: Yes
UniProt
Find proteins for P28307 (Escherichia coli (strain K12)) Explore P28307  Go to UniProtKB:  P28307

Experimental Data & Validation

Experimental Data

• Method: ELECTRON MICROSCOPY
• Resolution: 3.34 Å
• Aggregation State: PARTICLE 
• Reconstruction Method: SINGLE PARTICLE 

Structure Validation

Entry History 

Deposition Data

• Released Date: 2020-01-15 
Deposition Author(s): Yan, Z.F., Yin, M., Chen, J.N., Li, X.M.

Revision History  

• Version 1.0: 2020-01-15
  Type: Initial release
  
• Version 1.1: 2020-01-29
  Changes: Database references
• Version 1.2: 2024-03-27
  Changes: Data collection, Database references