>TIGR02349 DnaJ_bact chaperone protein DnaJ; InterPro: IPR012724 Molecular chaperones are a diverse family of proteins that function to protect proteins in the intracellular milieu from irreversible aggregation during synthesis and in times of cellular stress. The bacterial molecular chaperone DnaK is an enzyme that couples cycles of ATP binding, hydrolysis, and ADP release by an N-terminal ATP-hydrolizing domain to cycles of sequestration and release of unfolded proteins by a C-terminal substrate binding domain. Dimeric GrpE is the co-chaperone for DnaK, and acts as a nucleotide exchange factor, stimulating the rate of ADP release 5000-fold . DnaK is itself a weak ATPase; ATP hydrolysis by DnaK is stimulated by its interaction with another co-chaperone, DnaJ. Thus the co-chaperones DnaJ and GrpE are capable of tightly regulating the nucleotide-bound and substrate-bound state of DnaK in ways that are necessary for the normal housekeeping functions and stress-related functions of the DnaK molecular chaperone cycle. Besides stimulating the ATPase activity of DnaK through its J-domain, DnaJ also associates with unfolded polypeptide chains and prevents their aggregation . Thus, DnaK and DnaJ may bind to one and the same polypeptide chain to form a ternary complex. The formation of a ternary complex may result in cis-interaction of the J-domain of DnaJ with the ATPase domain of DnaK. An unfolded polypeptide may enter the chaperone cycle by associating first either with ATP-liganded DnaK or with DnaJ. DnaK interacts with both the backbone and side chains of a peptide substrate; it thus shows binding polarity and admits only L-peptide segments. In contrast, DnaJ has been shown to bind both L- and D-peptides and is assumed to interact only with the side chains of the substrate. DnaJ comprises a 70-residue N-terminal domain (the J-domain); a 30-residue glycine-rich region (the G-domain); a central domain containing 4 repeats of a CxxCxGxG motif (the CRR-domain); and a 120-170 residue C-terminal region. The J- and CRR-domains are found in many prokaryotic and eukaryotic proteins , either together or separately. This entry mostly consists of bacterial forms of DnaJ. The three components of the DnaK-DnaJ-GrpE system are typically encoded by consecutive genes. DnaJ homologues occur in many genomes, typically not encoded near DnaK and GrpE-like genes. Most such proteins are not included in this family, though some chloroplast homologues are included; GO: 0005524 ATP binding, 0051082 unfolded protein binding, 0006457 protein folding, 0009408 response to heat.

Probab=100.00 E-value=0 Score=873.29 Aligned_cols=355 Identities=50% Similarity=0.922 Sum_probs=326.1 Q ss_pred CCHHHHCCCCCCCHHHHHHHHHHHHHHHCCCCCCC-CHHHHHHHHHHHHHHHHHCCHHHHHHHHHHHHHHHHCCCCC--- Q ss_conf 52487187998899999999999999975699887-98799999999999876099899999877248765314555--- Q gi|254780638|r 5 DFYQVLGIDRNATDRQLKTAFRSLAMKYHPDQNRN-DPEAKEKFAQISEAYEVLRDPQKRALYDQGGHEALEYGAQS--- 80 (384) Q Consensus 5 DyY~iLGV~~~As~~eIKkAYrklA~k~HPDkn~~-d~~A~ekFkeI~eAYevLsD~~kR~~YD~~G~~~~~~~~~~--- 80 (384) T Consensus 1 DYYeiLGVsK~A~~~EIKKAYRkLA~kYHPD~Nkgn~~~AEeKFKEi~EAYeVLSD~~KRa~YDqfGh~g~~g~~~gg~R 80 (386) T TIGR02349 1 DYYEILGVSKDASEEEIKKAYRKLAKKYHPDRNKGNDKEAEEKFKEINEAYEVLSDPEKRAQYDQFGHAGFNGGGGGGFR 80 (386) T ss_pred CCCEEECCCCCCCHHHHHHHHHHHHHHCCCCCCCCCCCCHHHHHHHHHHHHHCCCCHHHHHHHHHHHHHHCCCCCCCCCC T ss_conf 95156242799898999999998888517888888883756765788877530689789987413436551678556515 Q ss_pred --CCC--CCEEC------CCCCCCC-----CCCCCCCCCCCCCC----CCCCCC-CCCCCCCCCCCCCCCCCCCCCHHCC Q ss_conf --665--21001------4432222-----22334443561013----760344-4222212222211232221000001 Q gi|254780638|r 81 --QGA--GGFGA------GMYGNSD-----FSELFEGIFGGIMG----SGRSYK-RSSSTGEAGADLRYNLEISLEEAFS 140 (384) Q Consensus 81 --~~~--~~~~~------~~~~~~~-----~~d~f~~~f~~~~~----~~~~~~-~~~~~~~~~~d~~~~~~islee~~~ 140 (384) T Consensus 81 GGg~~~f~~f~~~~~~Fggg~~F~~~~~~~fgdiF~~fFGg~~gsF~g~~r~~~~~~~~~~~~G~Dl~~~l~l~f~EAv~ 160 (386) T TIGR02349 81 GGGGGGFGGFDIFFGGFGGGGFFGDFTGSFFGDIFGDFFGGGGGSFAGSGRRKRRANRSGPRRGSDLRYDLELTFEEAVF 160 (386) T ss_pred CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCHHHHHHCCCCCEEECCCCCCCCCCCCCCCCCCCEEEEEEEEEEHEEE T ss_conf 77887877542330024467678876677641011556078743010178887656766675577538999887003331 Q ss_pred CCCCCCCCCCCCEECCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC---EEEEEEEECCCCCCCCEEEECCCCCCCCCCEE Q ss_conf 355444554431000234322578854210355310112100110---01246861666565546983541200112100 Q gi|254780638|r 141 GKTVQIRFPTAVKCSTCSGSGAKPGTNPMDCNICNGSGRVYTTAQ---SFFSIERACSTCRGSGQIIPHPCSKCHGQGRV 217 (384) Q Consensus 141 G~~~~i~~~~~~~C~~C~G~g~~~~~~~~~C~~C~G~G~~~~~~~---~~~~~~~~C~~C~G~g~i~~~~c~~C~G~g~~ 217 (384) T Consensus 161 G~eK~i~~~~~~~C~~C~GsGA~~g~~~~tC~~C~G~Gqv~~~~~t~fG~f~~~~tC~~C~G~G~ii~~~C~~C~G~G~~ 240 (386) T TIGR02349 161 GVEKEIEIPRLESCETCHGSGAKPGTDPKTCPTCGGTGQVRRQQGTPFGFFQQQQTCPTCGGEGKIIKEPCSTCKGKGRV 240 (386) T ss_pred CEEEEEEEEEEEECCCCCCCCCCCCCCCEECCCCCCEEEEEEECCCEEEEEEEEEECCCCCCEEEEEECCCCCCCCCEEE T ss_conf 21788886256626888761110888854787789758999971406589998587788584238963368998874069 Q ss_pred CCCCCCCHHHHHCCCCCCCEEECCCCCCCCCCCCCCCEEEEEECCCCCCEEEECCCCEEEEEECHHHHCCCCEEEEECCC Q ss_conf 01110000011001148501203677656788416641575310346842864148469998466651354248851678 Q gi|254780638|r 218 SEEKLLSVNVPPGVDDGTRIRLSGEGGAGVYGGAPGDLYIFISVKKHQFFKRDGADLYCTVPISIVTVAMGGTFDVATLD 297 (384) Q Consensus 218 ~~~~~~~I~Ip~G~~~G~~i~~~g~G~~~~~~~~~GDl~i~i~~~~h~~f~r~g~dL~~~~~I~l~eal~G~~~~i~tld 297 (384) T Consensus 241 ~~~~~~~v~IPaGV~~G~~lrv~G~G~aG~~GG~~GDLYv~i~Vk~h~~F~R~G~Dl~~~~pisf~~AiLG~~ieVPTl~ 320 (386) T TIGR02349 241 KERKTISVKIPAGVDTGQRLRVSGEGEAGENGGPNGDLYVVIRVKPHKIFERDGNDLYIEVPISFTQAILGGEIEVPTLD 320 (386) T ss_pred EEEEEEEEECCCCCCCCCEEEECCCCCCCCCCCCCCCEEEEEEEECCCCEEECCCCEEEEECCCHHHEEECCEEEEECCC T ss_conf 88889999617998889888876777567886888862799998018851663882799833782315627776861567 Q ss_pred CCCCCEEECCCCCCCCEEEECCEECCCCCCC---CCCCEEEEEEEECCCCCCHHHHHHHHHHHHH Q ss_conf 8823101168517788789888102006898---8652799999992989999999999999987 Q gi|254780638|r 298 ATHSRVTIPEGTQTGKQFRLKGKGMPVINSG---RKGDLYVQVQVETPQKLNKRQRELLEEFEQI 359 (384) Q Consensus 298 G~~i~i~i~~~~~~~~~~~i~g~G~p~~~~~---~rGdl~i~~~v~~P~~Ls~~qk~ll~~l~~~ 359 (384) T Consensus 321 G~~~~lkIP~GTq~G~~frl~gkG~p~~~~~~Fk~~GDl~v~V~v~~P~~Ls~~q~~lLe~l~~~ 385 (386) T TIGR02349 321 GGDVKLKIPAGTQSGTVFRLKGKGVPRLRGSNFKGRGDLLVTVKVETPKNLSKEQKELLEELAEA 385 (386) T ss_pred CCEEEEECCCCCCCCCEEEECCCCCCCCCCCCCCCCCCEEEEEEEEECCCCCHHHHHHHHHHHHC T ss_conf 87579972788888868997887501468876763366699999985898788899999999732

HHsearch alignment for GI: 254780638 and conserved domain: TIGR02349