T. M. Gruber and C. A. Gross, Multiple Sigma Subunits and the Partitioning of Bacterial Transcription Space, Annual Review of Microbiology, vol.57, issue.1, pp.441-66, 2003.
DOI : 10.1146/annurev.micro.57.030502.090913

A. Feklistov, B. D. Sharon, S. A. Darst, and C. A. Gross, Bacterial Sigma Factors: A Historical, Structural, and Genomic Perspective, Annual Review of Microbiology, vol.68, issue.1, pp.357-76, 2014.
DOI : 10.1146/annurev-micro-092412-155737

E. Klauck, A. Typas, and R. Hengge, The sigmaS subunit of RNA polymerase as a signal integrator and network master regulator in the general stress response in Escherichia coli, Sci Prog, vol.90, pp.103-130, 2007.

R. Hengge, The General Stress Response in Gram-Negative Bacteria, Bacterial Stress Responses, pp.251-289, 2011.
DOI : 10.1128/9781555816841.ch15

U. Romling, Characterization of the rdar morphotype, a multicellular behaviour in Enterobacteriaceae, Cellular and Molecular Life Sciences, vol.62, issue.11, pp.1234-1280, 2005.
DOI : 10.1007/s00018-005-4557-x

V. Robbe-saule, Crl Activates Transcription Initiation of RpoS-Regulated Genes Involved in the Multicellular Behavior of Salmonella enterica Serovar Typhimurium, Journal of Bacteriology, vol.188, issue.11, pp.3983-94, 2006.
DOI : 10.1128/JB.00033-06

T. Dong and H. E. Schellhorn, Role of RpoS in Virulence of Pathogens, Infection and Immunity, vol.78, issue.3, pp.887-97, 2010.
DOI : 10.1128/IAI.00882-09

S. Osterberg, T. Del-peso-santos, and V. Shingler, Regulation of Alternative Sigma Factor Use, Annual Review of Microbiology, vol.65, issue.1, pp.37-55, 2011.
DOI : 10.1146/annurev.micro.112408.134219

L. A. Pratt and T. J. Silhavy, Crl stimulates RpoS activity during stationary phase, Molecular Microbiology, vol.29, issue.5, pp.1225-1261, 1998.
DOI : 10.1073/pnas.94.21.11210

A. Bougdour, C. Lelong, and J. Geiselmann, That Binds Directly to the Stationary Phase ?? Subunit of RNA Polymerase, Journal of Biological Chemistry, vol.279, issue.19, pp.19540-19550, 2004.
DOI : 10.1074/jbc.M314145200
URL : https://hal.archives-ouvertes.fr/hal-00173294

T. Gaal, M. J. Mandel, T. J. Silhavy, and R. L. Gourse, Crl Facilitates RNA Polymerase Holoenzyme Formation, Journal of Bacteriology, vol.188, issue.22, pp.7966-70, 2006.
DOI : 10.1128/JB.01266-06
URL : http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1636326

V. Robbe-saule, M. D. Lopes, A. Kolb, and F. Norel, Physiological Effects of Crl in Salmonella Are Modulated by ??S Level and Promoter Specificity, Journal of Bacteriology, vol.189, issue.8, pp.2976-87, 2007.
DOI : 10.1128/JB.01919-06

A. Typas, C. Barembruch, A. Possling, and R. Hengge, Stationary phase reorganisation of the Escherichia coli transcription machinery by Crl protein, a fine-tuner of ??s activity and levels, The EMBO Journal, vol.15, issue.6, pp.1569-1578, 2007.
DOI : 10.1038/sj.emboj.7601629

P. England, Binding of the Unorthodox Transcription Activator, Crl, to the Components of the Transcription Machinery, Journal of Biological Chemistry, vol.283, issue.48, pp.33455-64, 2008.
DOI : 10.1074/jbc.M807380200

V. Monteil, Crl Binds to Domain 2 of ??S and Confers a Competitive Advantage on a Natural rpoS Mutant of Salmonella enterica Serovar Typhi, Journal of Bacteriology, vol.192, issue.24, pp.6401-6411, 2010.
DOI : 10.1128/JB.00801-10
URL : https://hal.archives-ouvertes.fr/pasteur-01414252

A. B. Banta, Structure of the RNA Polymerase Assembly Factor Crl and Identification of Its Interaction Surface with Sigma S, Journal of Bacteriology, vol.196, issue.18, pp.3279-88, 2014.
DOI : 10.1128/JB.01910-14

P. Cavaliere, subunit of RNA polymerase, Biochemical Journal, vol.143, issue.2, pp.215-239, 2014.
DOI : 10.1128/JB.00801-10
URL : https://hal.archives-ouvertes.fr/pasteur-01392714

M. Lonetto, M. Gribskov, and C. A. Gross, The sigma 70 family: sequence conservation and evolutionary relationships., Journal of Bacteriology, vol.174, issue.12, pp.3843-3852, 1992.
DOI : 10.1128/jb.174.12.3843-3849.1992

K. S. Murakami and S. A. Darst, Bacterial RNA polymerases: the wholo story, Current Opinion in Structural Biology, vol.13, issue.1, pp.31-40, 2003.
DOI : 10.1016/S0959-440X(02)00005-2

A. B. Banta, Key features of ??S required for specific recognition by Crl, a transcription factor promoting assembly of RNA polymerase holoenzyme, Proceedings of the National Academy of Sciences, vol.110, issue.40, pp.15955-15960, 2013.
DOI : 10.1073/pnas.1311642110

V. Monteil, A. Kolb, J. D-'alayer, P. Beguin, and F. Norel, Identification of Conserved Amino Acid Residues of the Salmonella ??S Chaperone Crl Involved in Crl-??S Interactions, Journal of Bacteriology, vol.192, issue.4, pp.1075-87, 2010.
DOI : 10.1128/JB.01197-09
URL : https://hal.archives-ouvertes.fr/pasteur-01414597

P. Cavaliere, F. Norel, and C. Sizun, 1H, 13C and 15N resonance assignments of ??S activating protein Crl from Salmonella enterica serovar Typhimurium, Biomolecular NMR Assignments, vol.59, issue.4, pp.10-1007, 2015.
DOI : 10.1007/s12104-015-9617-z

B. G. Pierce, ZDOCK server: interactive docking prediction of protein-protein complexes and symmetric multimers, Bioinformatics, vol.30, issue.12, pp.1771-1774, 2014.
DOI : 10.1093/bioinformatics/btu097

S. Lyskov, Serverification of Molecular Modeling Applications: The Rosetta Online Server That Includes Everyone (ROSIE), PLoS ONE, vol.819, issue.5, p.63906, 2013.
DOI : 10.1371/journal.pone.0063906.t003

S. J. De-vries, M. Van-dijk, and A. M. Bonvin, The HADDOCK web server for data-driven biomolecular docking, Nature Protocols, vol.3, issue.5, pp.883-97, 2010.
DOI : 10.1038/nprot.2010.32

T. A. Wassenaar, WeNMR: Structural Biology on the Grid, Journal of Grid Computing, vol.132, issue.4, pp.743-767, 2012.
DOI : 10.1007/s10723-012-9246-z
URL : https://hal.archives-ouvertes.fr/hal-00955916

M. K. Sorenson and S. A. Darst, Disulfide cross-linking indicates that FlgM-bound and free ??28 adopt similar conformations, Proceedings of the National Academy of Sciences, vol.103, issue.45, pp.16722-16729, 2006.
DOI : 10.1073/pnas.0606482103

H. Schmieger, Phage P22-mutants with increased or decreased transduction abilities, MGG Molecular & General Genetics, vol.15, issue.1, pp.75-88, 1972.
DOI : 10.1007/BF00270447

N. L. Sternberg and R. Maurer, [2] Bacteriophage-mediated generalized transduction in Escherichia coli and Salmonella typhimurium, Methods Enzymol, vol.204, pp.18-43, 1991.
DOI : 10.1016/0076-6879(91)04004-8

J. Sambrook, E. F. Fritsch, and T. Maniatis, Molecular cloning: a laboratory manual, 1989.

B. R. Bochner, H. C. Huang, G. L. Schieven, and B. N. Ames, Positive selection for loss of tetracycline resistance, J Bacteriol, vol.143, pp.926-959, 1980.

K. A. Datsenko and B. L. Wanner, One-step inactivation of chromosomal genes in Escherichia coli K-12 using PCR products, Proceedings of the National Academy of Sciences, vol.97, issue.12, pp.6640-6645, 2000.
DOI : 10.1073/pnas.120163297

R. G. Gerlach, D. Jackel, S. U. Holzer, and M. Hensel, Rapid Oligonucleotide-Based Recombineering of the Chromosome of Salmonella enterica, Applied and Environmental Microbiology, vol.75, issue.6, pp.1575-80, 2009.
DOI : 10.1128/AEM.02509-08

C. Levi-meyrueis, Repressor activity of the RpoS/??S-dependent RNA polymerase requires DNA binding, Nucleic Acids Research, vol.43, issue.3, pp.1456-68, 2015.
DOI : 10.1093/nar/gku1379

J. H. Miller, Experiments in molecular genetics, 1972.

F. Delaglio, NMRPipe: A multidimensional spectral processing system based on UNIX pipes, Journal of Biomolecular NMR, vol.6, issue.3, pp.277-93, 1995.
DOI : 10.1007/BF00197809

P. Guntert, Automated NMR Structure Calculation With CYANA, Methods Mol Biol, vol.278, pp.353-78, 2004.
DOI : 10.1385/1-59259-809-9:353

Y. Shen and A. Bax, Protein backbone and sidechain torsion angles predicted from NMR chemical shifts using artificial neural networks, Journal of Biomolecular NMR, vol.21, issue.3, pp.227-268, 2013.
DOI : 10.1007/s10858-013-9741-y

K. Suhre and Y. H. Sanejouand, ElNemo: a normal mode web server for protein movement analysis and the generation of templates for molecular replacement, Nucleic Acids Research, vol.32, issue.Web Server, pp.610-614, 2004.
DOI : 10.1093/nar/gkh368
URL : https://hal.archives-ouvertes.fr/hal-00344557

S. Chaudhury, Benchmarking and Analysis of Protein Docking Performance in Rosetta v3.2, PLoS ONE, vol.398, issue.8, p.22477, 2011.
DOI : 10.1371/journal.pone.0022477.s002

L. L. Schrodinger, The PyMOL Molecular Graphics System Available at: http://pymol, sourceforge.net, vol.1310, 2010.