6ZII | pdb_00006zii

Structure of the isolated REC domain of RcsB from Salmonella enterica serovar Typhimurium in the presence of phosphomimetic BeF3-

• PDB DOI: https://doi.org/10.2210/pdb6ZII/pdb

• Classification: DNA BINDING PROTEIN
• Organism(s): Salmonella enterica subsp. enterica serovar Typhimurium
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2020-06-26 Released: 2021-02-17 
• Deposition Author(s): Huesa, J., Marina, A., Casino, P.
• Funding Organization(s): Spanish Ministry of Economy and Competitiveness

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.50 Å
• R-Value Free: 
  0.278 (Depositor), 0.278 (DCC) 
• R-Value Work: 
  0.222 (Depositor), 0.224 (DCC) 
• R-Value Observed: 
  0.226 (Depositor) 

Starting Model: experimental

Literature

Structure-based analyses of Salmonella RcsB variants unravel new features of the Rcs regulon.

Huesa, J., Giner-Lamia, J., Pucciarelli, M.G., Paredes-Martinez, F., Portillo, F.G., Marina, A., Casino, P.

(2021) Nucleic Acids Res 49: 2357-2374

• PubMed: 33638994 
• DOI: https://doi.org/10.1093/nar/gkab060
• Primary Citation Related Structures: 
  6ZII, 6ZIL, 6ZIX, 6ZJ2


• PubMed Abstract: 
  

  RcsB is a transcriptional regulator that controls expression of numerous genes in enteric bacteria. RcsB accomplishes this role alone or in combination with auxiliary transcriptional factors independently or dependently of phosphorylation. To understand the mechanisms by which RcsB regulates such large number of genes, we performed structural studies as well as in vitro and in vivo functional studies with different RcsB variants. Our structural data reveal that RcsB binds promoters of target genes such as rprA and flhDC in a dimeric active conformation. In this state, the RcsB homodimer docks the DNA-binding domains into the major groove of the DNA, facilitating an initial weak read-out of the target sequence. Interestingly, comparative structural analyses also show that DNA binding may stabilize an active conformation in unphosphorylated RcsB. Furthermore, RNAseq performed in strains expressing wild-type or several RcsB variants provided new insights into the contribution of phosphorylation to gene regulation and assign a potential role of RcsB in controlling iron metabolism. Finally, we delimited the RcsB box for homodimeric active binding to DNA as the sequence TN(G/A)GAN4TC(T/C)NA. This RcsB box was found in promoter, intergenic and intragenic regions, facilitating both increased or decreased gene transcription.

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Organizational Affiliation: 
• Departamento de Bioquímica y Biología Molecular, Universitat de València. Dr Moliner 50, 46100 Burjassot, Spain.
Instituto universitario de Biotecnologia i Biomedicina (BIOTECMED), Universitat de València. Dr Moliner 50, 46100 Burjassot, Spain.
Laboratorio de Patógenos Bacterianos Intracelulares. Centro Nacional de Biotecnología (CNB)-CSIC. Darwin 3, 28049 Madrid. Spain.
Centro de Biotecnología y Genómica de Plantas (CBGP, UPM-INIA), Campus Montegancedo, E-28223 Pozuelo de Alarcón, Madrid, Spain.
Departamento de Biotecnología y Biología Vegetal, ETSI Agronómica, Alimentaria y de Biosistemas, Universidad Politócnica de Madrid, 28040 Madrid, Spain.
Centro de Biología Molecular 'Severo Ochoa' (CBMSO)-CSIC. Departamento de Biología Molecular. Universidad Autónoma de Madrid, Madrid, Spain.
Department of Genomic and Proteomic, Instituto de Biomedicina de Valencia (IBV-CSIC), Jaume Roig 11, 46010 Valencia, Spain.
Group 739 of the Centro de Investigación Biomédica en Red sobre Enfermedades Raras (CIBERER) del Instituto de Salud Carlos III, Spain.

Biological Assembly 1  

Global Symmetry: Cyclic - C2  (Explore in 3D)
Global Stoichiometry: Homo 2-mer - A2 

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

Biological Assembly Evidence: gel filtration

Macromolecule Content 

• Total Structure Weight: 31.59 kDa 
• Atom Count: 2,177 
• Modeled Residue Count: 277 
• Deposited Residue Count: 286 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Transcriptional regulatory protein RcsB	A [auth B], B [auth A]	143	Salmonella enterica subsp. enterica serovar Typhimurium	Mutation(s): 0  Gene Names:  rcsB, A2O69_13765, A3042_19525, A3104_15245, A3111_09650, A3122_12425, A3146_09020, A3R41_09960, A3S30_08650, A3T21_09515, A3T81_14325, A3U32_14885, A3V03_11040, A3V89_10805, A3W57_14915, A3W75_12230, A3W86_06130, A3X15_13890, A3X55_20780, A3Y76_07040, A3Z96_14340, A4J27_11660, A4N07_14810, A4O05_20855, A4O41_07785, A4R48_08340, A6D61_15370, A9C21_06135, A9R92_21345, A9T39_16135, A9U46_10475, A9U64_21675, A9U69_21545, AAA76_10930, AAB27_22280, AAB39_09270, AAB79_16325, AAC08_11475, AAC35_11250, AAC42_16960, AAC44_14685, AAC95_13155, AAC98_10995, AAK29_10400, AAP89_11275, AAQ24_16295, AB424_18490, ABO94_17915, ABP11_15160, ABP87_18790, ABQ69_20575, ADQ28_04890, ADQ45_05825, AE787_14130, AF480_10895, AF488_12145, AF489_17255, AF497_17465, AGC55_06475, AGM99_13695, AGQ32_04375, AH984_14180, AHN93_10200, AIC76_12470, AKH62_06605, AKH68_10310, AKI16_13295, AL144_14225, AL151_13230, AL166_17425, AL168_14180, AL170_15835, AL174_14280, AL184_16885, APP08_20700, APY91_13970, AQ530_14880, AQ536_13855, AS118_05400, AT354_14865, AU613_13115, AU731_17745, AU805_14740, AU830_17945, AU839_16960, AU951_10785, AU965_14440, AVA38_10850, AVB77_17860, AVB94_12475, AVC05_13710, AVC09_15555, AVD08_14940, AVD75_10490, AVD94_16345, AVG17_17440, AVL02_06935, AVL16_12105, AVM19_11045, AWT30_16365, AXM10_15020, AXM23_15980, AXR84_09155, AXU58_12665, AXX99_08590, B1265_14695, B1398_15040, B1642_12470, B1B86_13860, B1B89_12995, B1I91_14010, B1P38_06210, B1Q82_08785, B2E31_12855, B4V59_14365, B4W90_11945, B5A40_18175, B6362_19530, B6G98_09840, B6M25_12470, B6M43_11445, B7071_09685, B7890_16815, B7J30_08950, B7Q27_13330, B8Y16_13920, B8Y36_10435, B8Z46_12215, B9653_08735, B9C61_09460, B9C71_10305, B9C90_09140, B9C91_11100, B9C96_06975, B9M14_15255, B9O84_06255, B9U29_20160, BBQ66_07980, BEL47_15520, BFE55_17500, BFE61_13600, BGP52_15605, BIC00_11775, BIC01_03425, BIC03_12465, BIC13_09510, BJP89_14935, BK110_11970, BKM50_13625, BLB03_12065, BMG85_01485, BMS46_14205, BMU56_10065, BSC80_16315, BSD55_15985, BZ203_13370, BZ210_08250, BZG47_14895, BZN20_13125, BZZ88_21635, C4E88_11520, C5U54_24325, C5W43_17645, CA117_14980, CB102_02675, CB119_10390, CB161_08930, CB198_19420, CB380_13295, CB383_12585, CB416_11695, CB530_12435, CB535_09465, CB570_05200, CB646_09025, CB657_11330, CBH20_11220, CBM40_08545, CBM67_14430, CBM76_12750, CBN77_20665, CBO42_14460, CBR08_08850, CBU15_19945, CBU32_00760, CBZ90_12320, CC339_03310, CC403_05060, CC453_12125, CC594_20855, CC652_11600, CC725_10110, CC886_11620, CC918_07450, CC944_09505, CC971_10010, CCF93_15515, CCP17_10715, CCW27_14410, CD48_15270, CD977_10835, CDJ75_08265, CDQ60_11320, CDT37_13185, CDZ72_16490, CE355_08040, CE615_16735, CE70_14835, CE806_10370, CE87_12900, CE896_01015, CEC46_09750, CEC56_04870, CED07_06500, CEL48_20705, CEL55_09205, CEQ70_15765, CER78_12570, CET98_13495, CEY64_16305, CFB16_15760, CFB28_17680, CFE76_19020, CFE79_15610, CFF58_13355, CFF59_13510, CFJ48_12690, CGG73_15810, CHN22_08020, CI444_12440, CIX60_15545, CJC42_16545, CPR79_14100, CPS79_08255, CPX68_07570, CQE35_07160, CQG18_09040, CQO33_12635, CR370_10310, CRB02_10290, CSG22_12970, CVR97_09845, D3147_17580, D3174_01810, D3F31_11215, D3T68_22780, D3Y48_14800, D4361_11425, D4369_10470, D4380_14255, D4387_10710, D4422_10715, D4E62_15595, D4E68_12645, D4E74_04805, D4X64_11635, D4X79_12705, D4Y62_12305, D5823_23275, D5949_13360, D5B48_08355, D5C67_13450, D5C71_13810, D5N86_08445, D5N95_12575, D5O82_10940, D5P17_11555, D5X47_11830, D5X51_21070, D5Y28_05580, D6360_11195, D6367_13185, D6371_12525, D6373_13850, D6395_09765, D6421_13000, D6422_12760, D6J79_14230, D6K10_23715, D6P67_11555, D6Q64_13765, D6S43_13075, D6T00_11290, D6T40_07430, D7F20_11320, D7H43_01075, D7N92_12075, D7O44_13065, D8Q90_09500, D8S24_13515, D9O84_14155, DD95_02420, DJ388_15095, DJ702_13640, DK061_07980, DK631_02345, DK641_19375, DK642_13375, DK689_12355, DK696_07780, DK698_07265, DKJ10_12345, DKR95_07440, DKS55_11340, DKU45_11320, DKU57_10630, DKU80_05405, DLB14_07805, DLB57_08870, DLB93_12855, DLR28_13470, DM322_20130, DM733_21940, DMI89_06860, DMO92_13710, DMV40_11670, DMZ93_22620, DN165_13395, DN204_13780, DN359_20245, DNB97_22830, DNL62_12910, DNM27_08910, DNM63_11945, DNU59_10640, DNV08_13515, DNV12_21330, DNV30_09985, DNY92_08010, DNZ37_12590, DO350_10650, DO533_09745, DO585_12725, DO640_13295, DO698_21090, DO766_09590, DO828_16445, DO960_04625, DOC60_14865, DOH72_12230, DOI32_09640, DOI53_11380, DOI92_10015, DOJ39_13330, DOJ91_15905, DOQ54_10850, DOQ88_19075, DOR12_10695, DOV43_19010, DOW25_10390, DP680_11760, DPB42_06345, DPB45_09375, DPB48_12795, DPB57_11855, DPD91_07890, DPD95_08365, DPD99_18580, DPF41_10345, DPF68_09290, DPJ93_06885, DPK32_10835, DPK79_10855, DPL02_08725, DPP13_16840, DPP94_12530, DPP97_14020, DPS76_08870, DPT18_10485, DPU20_11590, DPY58_18740, DQ848_10815, DQ947_12275, DQ951_12780, DQC39_14690, DQC52_17465, DQD03_12025, DQD22_14205, DQE64_12330, DQE65_13455, DQK42_17635, DQQ98_14965, DQR10_20350, DQR44_12005, DQR61_11120, DQS14_10375, DQY10_09140, DQZ46_08550, DQZ56_12760, DR982_22020, DRL45_07940, DRM14_11520, DRM16_14710, DRR75_23095, DRT38_13015, DRT61_23690, DRT65_15310, DRV05_08945, DRW84_11665, DRX36_22780, DRX66_07345, DS270_18375, DS296_03655, DS451_17430, DS453_12950, DS521_10015, DS619_11600, DSF69_12145, DSF94_10460, DSG41_14570, DSM38_11155, DSN15_12590, DSR36_10905, DTE73_10415, DTF68_07740, DTG22_22525, DTG27_16445, DTW13_10745, DTW14_14950, DTW26_11965, DU071_21905, DU223_06195, DU657_07745, DU821_10140, DU879_10520, DU924_08500, DUQ28_11140, DUQ56_08490, DUQ92_13185, DUR36_14185, DUV75_15260, DUW10_15950, DUW48_09895, DVF14_11920, DVF88_08270, DVG01_14360, DVZ53_05935, DWU22_23860, DWU62_21645, DY580_21440, DYM27_06865, DYS82_09690, DZG11_20930, E0584_16370, E0595_14185, E0600_21890, E0935_14485, E0989_09310, E0M34_15895, E0S07_16310, E0U75_13640, E0V94_09045, E1336_08925, E1A11_13485, E1A20_12000, E5196_05695, E6W45_14470, EBB93_17635, EBC01_10965, EBD14_12205, EBD99_18850, EBK21_14930, EBL31_09840, EBO41_09410, EBP31_06115, EC404_15850, EC52_15480, ECA50_20460, ECC89_11785, ED424_08285, ED467_11830, EDL18_13765, EEK73_13190, EEQ30_16240, EER35_07340, EGL32_12130, EGN81_07495, EGU67_13655, EGU98_14315, EHB09_14460, EHB24_11945, EHB55_22345, EHC98_05345, EIE48_10505, EIW53_04795, EJI18_11350, EJO08_13340, EJO98_13625, EKA25_12980, EL822_07390, ELO47_09560, ELR28_08900, ELS01_12400, EM832_12680, EM840_06380, EMN66_07620, EMY79_09360, EO190_08315, EP115_18440, EP446_20135, EPB30_13505, EPH81_08120, EQG93_05510, EQG94_13030, ERM04_09810, EU306_11875, EU349_11640, EU873_21965, EUB95_05675, EUQ56_12115, EUQ65_09175, EUQ74_13570, EUS13_08790, EVT69_22445, EVY71_04215, EW905_06135, EWB18_06485, EWE52_05820, EWJ47_09340, EWZ09_13550, EXA47_07665, EXB31_05300, EXB41_09095, EYA29_15940, EYJ91_08825, F0D96_14965, F2O93_14305, F2P00_11865, F3Q46_16675, F3Q58_07850, F3Q59_15070, F3Q88_00720, F3Q97_16025, F3R12_18690, F3R61_10195, F3R63_13520, F9G02_06435, F9O44_04025, FE758_13940, FEM52_13990, FGZ46_08850, FJM64_14760, FL833_11895, FQC24_10010, FQD13_04095, FQX78_02535, GCH31_06840, GCQ81_17295, GCZ80_15980, GEZ01_10265, GW08_14750, JO10_24665, KP44_13855, LZ63_14980, NCTC13348_05301, NG02_14230, NG06_18895, NG18_08765, NU83_17610, QA89_08030, QB40_11485, QD15_11360, R035_06990, RJ78_11590, SAMEA4398682_01637, SE14_02481, Y934_23370, YG50_16765, YR17_10960, YT65_22010, Z700_22650, Z705_18140, ZB89_19920, ZC54_19680, ZT09_16805, ZT28_13365, ZT74_18075, ZT89_18160, ZU86_17815, ZU92_16805, ZV06_14780, ZV17_16185, ZV33_17250, ZV34_18355, ZV38_13400, ZV58_19590, ZV70_18315, ZV76_14470, ZV78_21800, ZV90_21250, ZW74_16110, ZX03_15750, ZY23_11835, ZY27_17660, ZY40_02770, ZY51_16230, ZZ18_15945, ZZ43_13745, ZZ77_13130, ZZ79_15595
UniProt
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Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
BEF	D [auth B], F [auth A]	BERYLLIUM TRIFLUORIDE ION Be F3 OGIAHMCCNXDTIE-UHFFFAOYSA-K
MG	C [auth B], E [auth A]	MAGNESIUM ION Mg JLVVSXFLKOJNIY-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.50 Å
• R-Value Free:  0.278 (Depositor), 0.278 (DCC) 
• R-Value Work:  0.222 (Depositor), 0.224 (DCC) 
• R-Value Observed: 0.226 (Depositor) 

Space Group: P 1 2₁ 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 38.144	α = 90
b = 64.4	β = 100.14
c = 47.131	γ = 90

Software Package:

Software Name	Purpose
REFMAC	refinement
Aimless	data scaling
PDB_EXTRACT	data extraction
XDS	data reduction
PHASER	phasing

Structure Validation

Entry History 

& Funding Information

Deposition Data

• Released Date: 2021-02-17 
Deposition Author(s): Huesa, J., Marina, A., Casino, P.

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Funding Organization	Location	Grant Number
Spanish Ministry of Economy and Competitiveness	Spain	BFU2016-78606-P
Spanish Ministry of Economy and Competitiveness	Spain	BIO2016-78571-P
Spanish Ministry of Economy and Competitiveness	Spain	BIO2016-77639-P
Spanish Ministry of Economy and Competitiveness	Spain	RYC-2014-16490

Revision History  

• Version 1.0: 2021-02-17
  Type: Initial release
  
• Version 1.1: 2021-03-10
  Changes: Database references
• Version 1.2: 2024-01-31
  Changes: Data collection, Database references, Refinement description
• Version 1.3: 2024-11-13
  Changes: Structure summary
• Version 2.0: 2026-09-02
  Type: Remediation
  Reason: Metalloprotein remediation
  Changes: Atomic model, Data collection, Derived calculations, Non-polymer description, Polymer sequence, Structure summary