>TIGR00178 monomer_idh isocitrate dehydrogenase, NADP-dependent; InterPro: IPR004436 This family of enzymes catalyses the NADP(+)-dependent oxidative decarboxylation of isocitrate to form 2-oxoglutarate, CO2, and NADPH within the Krebs cycle (1.1.1.42 from EC). Thus this enzyme supplies the cell with a key intermediate in energy metabolism, and precursors for biosynthetic pathways. The activity of this enzyme, which is controlled by phosphorylation, helps regulate carbon flux between the Krebs cycle and the glyoxylate bypass, which is an alternate route that accumulates carbon for biosynthesis when acetate is the sole carbon source for growth . The phosphorylation state of this enzyme is controlled by isocitrate dehydrogenase kinase/phosphatase. This family has been found in a number of bacterial species including Azotobacter vinelandii, Corynebacterium glutamicum, Rhodomicrobium vannielii, and Neisseria meningitidis. The structure of isocitrate dehydrogenase from Azotobacter vinelandii (P16100 from SWISSPROT) has been determined . This molecule consists of two distinct domains, a small domain and a large domain, with a folding topology similar to that of dimeric isocitrate dehydrogenase from Escherichia coli (P08200 from SWISSPROT). The structure of the large domain repeats a motif observed in the dimeric enzyme. Such a fusional structure by domain duplication enables a single polypeptide chain to form a structure at the catalytic site that is homologous to the dimeric enzyme, the catalytic site of which is located at the interface of two identical subunits.; GO: 0004450 isocitrate dehydrogenase (NADP+) activity, 0006099 tricarboxylic acid cycle.

Probab=97.81 E-value=0.00038 Score=45.19 Aligned_cols=315 Identities=15% Similarity=0.144 Sum_probs=184.6 Q ss_pred HCCCCCCEEEEEECCHHHHHHHCCCCCHHHHHHHHHCCEEEECCCCCCCCCC--CCCCCCCCCCCCHHHHHHHHCCCEEE Q ss_conf 4179984489982748998652862778999999865938872644898544--32112442211045898973296688 Q gi|254780902|r 31 IHPYLDIKIEYFDLSIQNRDLTDDQVTIDAAHAIKNCGVGIKCATITADQAR--VKEFNLKKMWKSPNGTIRNILGGIIF 108 (412) Q Consensus 31 ~~~~~~i~~e~~d~G~~~~d~tg~~l~~da~eaik~~~v~lkg~~~tP~~~~--~~~~~l~~~~~S~n~~LR~~ldl~~~ 108 (412) T Consensus 325 ~~~~p~~~~~~~~~g~~~~~~p~d~~~d~~~p~~~~~~g~~wg~dg~~~d~~~~~p~~~~~g~~~~~-~~~c~~~---g~ 400 (745) T TIGR00178 325 YEDRPELAMVDSDKGITNLHVPSDVIVDASMPALIRASGKMWGPDGKLKDTKAVIPDSSYAGVYQAV-IEDCKEN---GA 400 (745) T ss_pred HHCCCCEEEECCCCCCCCCCCCCCCEECCCCCHHHHHCCCCCCCCCCCCCHHHCCCCCHHHHHHHHH-HHHHHHC---CC T ss_conf 4047530100021353112465200011321034540453227764100001104540235789999-9987633---77 Q ss_pred EEEEEECCCCCCCCCCCCCEEEEECCCCCCCCCCE--EEECCCCEEEEEEECCCCCCEEEEEECCCCCCEEEEEECCHHH Q ss_conf 30588048787788877867998505666300101--4777884599999548886102554124665301011105146 Q gi|254780902|r 109 REPIICSNVPRLIPGWKKPIIIGRHAFGDQYRATD--FQFPSKGKLILKFVGDDGQTIEKEVFDSPGSGIAMAMYNLDDS 186 (412) Q Consensus 109 ~rp~~~~~~p~~~~~~~~divivREnteg~Y~gie--~~~~~~~~~~i~~~~~~g~~~~~~~~~~~~~~~~~~~~~t~~~ 186 (412) T Consensus 401 ~~p~~~g~~p---------~~gl~~~~~~~~g~~d~~~~~~~~g~~~~~~~-~~g~--~l~~~~~~~gd~w~~c~~~d~p 468 (745) T TIGR00178 401 FDPTTMGTVP---------NVGLMAQKAEEYGSHDKTFEIPADGVVRVVDV-SSGE--VLLEEDVEAGDIWRLCQVKDAP 468 (745) T ss_pred CCCCCCCCCC---------CCHHHHHHHHHCCCCCCEEEECCCCEEEEEEC-CCCC--HHHHHCCHHHHHHHHHHHCCCC T ss_conf 6741124455---------41023343444066554022034550455422-3342--0211000000244444313452 Q ss_pred HHHHHHHHHHHHHHCCCCEEE-E-----ECHHHHHHHHHHHHHHHHHHHHHHCCCCCCCCCEEHHH-HHHHHHHHHHH-- Q ss_conf 889999999999865998999-9-----74267775108999999999863100245423200024-36999999985-- Q gi|254780902|r 187 IRNFARAAMQYALARQLPLYL-S-----TKDTILKSYDGRFKNIFNEIFEAEFKNQFDELGITYTH-RLIDDMVASSI-- 257 (412) Q Consensus 187 i~Riar~AF~~A~~~~~kvt~-v-----~KaNVlk~tdglf~~~~~eva~~~~~~~~~~~~i~~~~-~~vD~~~~~lv-- 257 (412) T Consensus 469 ~~dw~~l~~~~~~~~g~p~~~wldp~~~~~~~~~~~~--------~~~l~d-----~d~~gld~~~~~p~~~~~~~~~~~ 535 (745) T TIGR00178 469 IQDWVKLAVTRARASGTPAVFWLDPERAHDEELIKKV--------ETYLKD-----HDTEGLDIQILSPVEATRFTLARL 535 (745) T ss_pred HHHHHHHHHHHHHHCCCCEEEEECCCCCCHHHHHHHH--------HHHHHH-----CCCCCCCEEEHHHHHHHHHHHHHH T ss_conf 4567887664433037733675154333057899999--------887530-----366664121000355677768886 Q ss_pred CCCCCEEEEECCCCCHHHHHHHHHH-HCCCCCCEEEECCCCCCEEEEC-CCCCCHHHHHHHHHCCCCCCCCHHHHHHHHH Q ss_conf 4966518863210232678888775-0753231243127987514421-2222034556554248775547279999999 Q gi|254780902|r 258 KWSGGYIWACKNYDGDVQSDIVAQG-FGSLGLMTSVLITADGKTMETE-AAHGTVTRHYRQHQQGKETSTNSIASIFAWT 335 (412) Q Consensus 258 ~~P~~fVivt~NL~GDIlSD~aa~l-~GglGlapSanig~~~~~~mfE-p~HGSAPd~~g~~iaGk~iA~NP~a~IlS~a 335 (412) T Consensus 536 ~~g~d~~~~~g~~l~d~~~dl~p~~~lg~~~~~l~~~pl~~gg-g~~~~g~gg~~p~~~~~~~~~~~l~wd~lg~~l~l~ 614 (745) T TIGR00178 536 RRGEDTISVTGNVLRDYLTDLFPILELGTSAKMLSVVPLMAGG-GLFETGAGGSAPKHVQQFLEENHLRWDSLGEFLALA 614 (745) T ss_pred HCCCHHHHHHHHHHHHHHHHHHHHHHCCCCHHHHHHHHHHCCC-CCCCCCCCCCCHHHHHHHHHHCCCCHHHHHHHHHHH T ss_conf 4021012221346766554455555404311233221110377-511046776542678887651332111245678876 Q ss_pred HHHHHHHCCCCCHHHHHHHHHHHHHHHHHHHCCC-CCHHHH Q ss_conf 9999863025730389999999999999998798-163230 Q gi|254780902|r 336 RGLLHRAKLDENAELKKFAENLERVCIKTVEDGF-MTKDLA 375 (412) Q Consensus 336 mmL~hlg~~~~~~~~~~~A~~i~~Av~~~l~~G~-~T~DLg 375 (412) T Consensus 615 ~~~~~~~~~~g~~~~~~l~~~ld~~~g~~l~~~~~p~~~~g 655 (745) T TIGR00178 615 ASLEHLGNKTGNPKAGVLADTLDAATGKLLDNNKSPSRKVG 655 (745) T ss_pred HHHHHHHHCCCCHHHHHHHHHHHHHHHHHHCCCCCCCCCCC T ss_conf 44566552046414567777776666665304566420013

HHsearch alignment for GI: 254780902 and conserved domain: TIGR00178