Cysteine desulfurase; Master enzyme that delivers sulfur to a number of partners involved in Fe-S cluster assembly, tRNA modification or cofactor biosynthesis. Catalyzes the removal of elemental sulfur atoms from cysteine to produce alanine. Functions as a sulfur delivery protein for Fe-S cluster synthesis onto IscU, an Fe-S scaffold assembly protein, as well as other S acceptor proteins; Belongs to the class-V pyridoxal-phosphate-dependent aminotransferase family. NifS/IscS subfamily.

Conserved hypothetical protein; Involved in iron-sulfur cluster biogenesis. Binds a 4Fe-4S cluster, can transfer this cluster to apoproteins, and thereby intervenes in the maturation of Fe/S proteins. Could also act as a scaffold/chaperone for damaged Fe/S proteins.

CyaY protein; Involved in iron-sulfur (Fe-S) cluster assembly. May act as a regulator of Fe-S biogenesis.

Chaperone protein; Co-chaperone involved in the maturation of iron-sulfur cluster-containing proteins. Seems to help targeting proteins to be folded toward HscA; Belongs to the HscB family.

Nitrogen fixation protein; Similar to Klebsiella pneumoniae NifZ protein NifZ SWALL:NIFZ_KLEPN (SWALL:P08533) (148 aa) fasta scores: E(): 3.6e-33, 57.24% id in 145 aa, and to Pantoea agglomerans NifZ protein NifZ SWALL:Q52072 (EMBL:X99694) (147 aa) fasta scores: E(): 5.6e-30, 56.55% id in 145 aa.

Ferredoxin, 2Fe-2S; Similar to Escherichia coli, Escherichia coli O157:H7, and Shigella flexneri ferredoxin, 2fe-2s Fdx or b2525 or z3792 or ecs3391 or sf2572 SWALL:AAN44071 (EMBL:M88654) (111 aa) fasta scores: E(): 6.7e-39, 84.68% id in 111 aa.

Similar to Escherichia coli cysteine sulfinate desulfinase CsdA or b2810 SWALL:CSDA_ECOLI (SWALL:Q46925) (401 aa) fasta scores: E(): 1.6e-104, 69.82% id in 401 aa, and to Salmonella typhimurium putative selenocysteine lyase csda or stm2984 SWALL:Q8ZMC3 (EMBL:AE008836) (401 aa) fasta scores: E(): 3.2e-101, 67.83% id in 401 aa.

Selenocysteine lyase; Cysteine desulfurases mobilize the sulfur from L-cysteine to yield L-alanine, an essential step in sulfur metabolism for biosynthesis of a variety of sulfur-containing biomolecules. Component of the suf operon, which is activated and required under specific conditions such as oxidative stress and iron limitation. Acts as a potent selenocysteine lyase in vitro, that mobilizes selenium from L- selenocysteine. Selenocysteine lyase activity is however unsure in vivo.

Putative DnaJ-like heat shock protein; Regulatory DnaK co-chaperone. Direct interaction between DnaK and DjlA is needed for the induction of the wcaABCDE operon, involved in the synthesis of a colanic acid polysaccharide capsule, possibly through activation of the RcsB/RcsC phosphotransfer signaling pathway. The colanic acid capsule may help the bacterium survive conditions outside the host.