HHsearch alignment for GI: 254781018 and conserved domain: TIGR00191

>TIGR00191 thrB homoserine kinase; InterPro: IPR000870 Saccharomyces cerevisiae strains containing the erg8-1 mutation are temperature sensitive for growth due to a defect in phosphomevalonate kinase, an enzyme of isoprene and ergosterol biosynthesis. Subcloning and DNA sequencing have defined the functional ERG8 regulon as an 850bp upstream region and an adjacent 1,272bp open reading frame. The deduced ERG8 protein contains 424 residues and shows no similarity to known proteins, except within a putative ATP-binding domain present in many kinases . Enzymes that share the N-terminal Gly/Ser-rich putative ATP-binding region include galactokinase, homoserine kinase, mevalonate kinase and phosphomevalonate kinase. Homoserine kinase is a homodimeric enzyme involved in threonine biosynthesis. Sequence comparison of the yeast enzyme with the corresponding proteins from bacterial sources reveals the presence of several highly conserved regions, the pattern of occurrence of which suggests that the ancestral sequences might have been composed from separate (functional) domains. A block of similar residues, found towards the C-terminus, is also present in many other proteins involved in threonine (or serine) metabolism; this motif may therefore represent the binding site for the hydroxy-amino acids. Limited similarity was detected between a motif conserved among the homoserine kinases and consensus sequences found in other mono- or dinucleotide-binding proteins .; GO: 0004413 homoserine kinase activity, 0005524 ATP binding, 0006566 threonine metabolic process.
Probab=99.90  E-value=4.2e-21  Score=151.74  Aligned_cols=215  Identities=20%  Similarity=0.233  Sum_probs=169.1

Q ss_pred             CCCCEEEEEECCCCCCCCCCCCHHHHHHHHHHHHHHHCCCCCCHHHHHHHHHHHHHCCCCCCCCHHHHHHHHCCCEEE-E
Q ss_conf             788769999805541038985303789999999998187754025899999986411577877345787653263024-0
Q gi|254781018|r  112 ISCGISLDLHSTIPIGSGFGSSSAIISALSLALSSITHQPFCNKEKLIAETGYIERLQHGKTGIIDSTTIVMGGIIYI-N  190 (337)
Q Consensus       112 ~~~g~~i~i~s~iP~~~GLGSSaA~~va~~~al~~~~~~~~~~~~~~~~~a~~~e~~~~~~~sg~D~~~~~~gg~~~~-~  190 (337)
T Consensus        85 ~~~p~k~~~~~~iP~grGLGSSAaaiVaa~~a~ne~~g~~l~-~~~~L~~a~~~E~~~SGs~HpDNvaPa~~GG~~~~~~  163 (359)
T TIGR00191        85 FIKPVKLTLEKNIPLGRGLGSSAAAIVAALLAANELAGLPLS-KEELLDLALELEGRISGSIHPDNVAPALLGGFQLAVK  163 (359)
T ss_pred             CCCCEEEEEECCCCCCCCCCHHHHHHHHHHHHHHHHHCCCCC-HHHHHHHHHHHHHHCCCCCCHHHHHHHHHCCEEEEEE
T ss_conf             888768998538510136663899999999999998388989-8999999999864305775713467885166279884


Q ss_pred             CCCC------------CCCCCC--------------------------CCCEEEEECCCCCCCHHHHHHHHHHHHCCCHH
Q ss_conf             2785------------200147--------------------------88439997497145379999999976412068
Q gi|254781018|r  191 PPQI------------IKNETL--------------------------VGEWWAINTGMPESSTGECVSFVEQHFSQSSI  232 (337)
Q Consensus       191 ~~~~------------~~~~~~--------------------------~~~~~~i~~~~~~~st~~~~~~~~~~~~~~~~  232 (337)
T Consensus       164 ~~~~Pqeverrei~~~~~~~~P~~GedtGlvPPlPPtdiGrhvkyqWn~~~~~v~aIP~~~~sT~~AR~vLPk~Y~~~d~  243 (359)
T TIGR00191       164 EDDKPQEVERREIVLLEVLKIPIFGEDTGLVPPLPPTDIGRHVKYQWNSKLKVVLAIPNIEVSTAEARAVLPKAYPRQDL  243 (359)
T ss_pred             ECCCCCCHHHHHHHHHHHHCCCCCCCCCCCCCCCCCCCCCCCCEEEECCCCCEEEECCCCCCCHHHHHHHCCCCCCHHHH
T ss_conf             27987611356665666414889876665679778522344200201676517998178420568896205554678899


Q ss_pred             HHHHHHHHHHHHHHHHCCC-CHHHHHHHH---HHHHHHHHCCCCCHHHHHHH---HHHHHCCC-EEEECCCCCCCCCEEE
Q ss_conf             9998765489999998387-216899999---95999997189977999999---99985798-0895078867885089
Q gi|254781018|r  233 WSEFNAVTNEMMENIQKKD-AEKTYKSVR---VNQSLLESIGVVPETVGKFI---RCIENNGG-SAKIAGAGSIRGEKAG  304 (337)
Q Consensus       233 ~~~~~~i~~~~~~al~~~d-~~~l~~~~~---~~~~ll~~l~vs~~~l~~l~---~~~~~~g~-~ak~sGAG~~~Gg~~~  304 (337)
T Consensus       244 v~n~~~l~~-l~~A~~~~dP~~~l~~~~~kD~~hqPyR~~L---~P~l~~i~sCv~~~~~~Ga~~~~iSGsGPT-----i  314 (359)
T TIGR00191       244 VFNLSHLAG-LVHALYQKDPKPDLLAIMMKDRIHQPYRESL---IPNLFKIKSCVQAALEKGALGITISGSGPT-----I  314 (359)
T ss_pred             HHHHHHHHH-HHHHHCCCCCHHHHHHHHHCCCCCCCCCCCC---CCHHHHHHHHHHHHHHCCCEEEEECCCCHH-----H
T ss_conf             998877877-7756107996289999973385011634223---614899899999997358648871120105-----5


Q ss_pred             EEEEECCC--HHHHHHH--------CCCEEEEEEECCCCEEE
Q ss_conf             99985799--7999974--------59869999987997092
Q gi|254781018|r  305 LVLVGGYN--PEKLSSL--------YGYTCYKIKEDKNGTML  336 (337)
Q Consensus       305 ~~l~~~~~--~~~~~~~--------~~~~~~~~~~~~~G~~i  336 (337)
T Consensus       315 la~~~e~~G~~~~~~~~~~~~~~~~~e~~v~~~~~d~~G~~~  356 (359)
T TIGR00191       315 LALADEEFGTEQKAQDLLENLHKQGIEGTVHVLEIDTDGARV  356 (359)
T ss_pred             HHCCCCCCCHHHHHHHHHHHHHHCCCCCEEEEECCCCCCCEE
T ss_conf             516888877577769998777641653244420233576146