>cd00685 Trans_IPPS_HT Trans-Isoprenyl Diphosphate Synthases (Trans_IPPS), head-to-tail (HT) (1'-4) condensation reactions. This CD includes all-trans (E)-isoprenyl diphosphate synthases which synthesis various chain length (C10, C15, C20, C25, C30, C35, C40, C45, and C50) linear isoprenyl diphosphates from precursors, isopentenyl diphosphate (IPP) and dimethylallyl diphosphate (DMAPP). They catalyze the successive 1'-4 condensation of the 5-carbon IPP to allylic substrates geranyl-, farnesyl-, or geranylgeranyl-diphosphate. Isoprenoid chain elongation reactions proceed via electrophilic alkylations in which a new carbon-carbon single bond is generated through interaction between a highly reactive electron-deficient allylic carbocation and an electron-rich carbon-carbon double bond. The catalytic site consists of a large central cavity formed by mostly antiparallel alpha helices with two aspartate-rich regions (DDXX(XX)D) located on opposite walls. These residues mediate binding of pre

Probab=100.00 E-value=0 Score=546.20 Aligned_cols=294 Identities=40% Similarity=0.655 Sum_probs=281.2 Q ss_pred CCCHHHHHHHHHHHHCCCCHHHHHHHHHHHHHHCCCH-HHHHHHHHHHHHHHHHHHHHHHHHCHHHHHHHCCCCHHHCCC Q ss_conf 7875899999999967982279999999999708985-786666557899999998752110112200110121010011 Q gi|254780755|r 25 SDVEMIPDVVKYLIFSGGKRLRPMLTLATALMLEYRG-DNHVLLACAIEFIHTATLLHDDVVDDSALRRGKVAARLVWGN 103 (322) Q Consensus 25 ~~~~~l~~~~~~~~~~gGKr~Rp~l~~l~~~~~~~~~-~~~~~~a~~iEliH~asLiHDDI~D~~~~RRg~~t~~~~~G~ 103 (322) T Consensus 1 ~~~~~l~~~~~y~~~~gGKrlRp~l~ll~~~~~~~~~~~~~~~~A~aiEliH~asLiHDDiiD~s~~RRG~pt~h~~~g~ 80 (298) T cd00685 1 SEVELLREALRYLLLAGGKRLRPLLVLLAARALGGPELEAALRLAAAIELLHTASLVHDDVMDNSDLRRGKPTVHKVFGN 80 (298) T ss_pred CCCHHHHHHHHHHHCCCCCCHHHHHHHHHHHHHCCCCHHHHHHHHHHHHHHHHHHHHHHHHHCCCCCCCCCCCHHHHCCC T ss_conf 96389999999886389743879999999998199956889999999999999999982410586545899878887299 Q ss_pred HHHHHHHHHHHHHHHHHHHCCCC---CCCCHHHHHHHHHHHHHHHHHHHHHCCCCCCHHHHHHHHHHHHHHHHHHHHHHH Q ss_conf 02343124578888764210243---110001234567777775456554213221035789899864335555443210 Q gi|254780755|r 104 QTSVLVGDFLLSQAFCMVIETKS---QEALEALSLVACTLAEGELRQLSLSKNLDVTEEDYLHVIKSKTAVLFSAALEVS 180 (322) Q Consensus 104 ~~Ail~GD~l~~~a~~~l~~~~~---~~~~~~~~~~~~~l~~Gq~~d~~~~~~~~~s~~~y~~ii~~KTa~Lf~~~~~~g 180 (322) T Consensus 81 ~~AIl~GD~l~~~a~~~l~~~~~~~~~~~~~~~~~~~~~~~~Gq~~d~~~~~~~~~~~~~y~~~~~~KTa~l~~~~~~~g 160 (298) T cd00685 81 ATAILAGDYLLARAFELLARLGNPYYPRALELFSEAILELVEGQLLDLLSEYDTDVTEEEYLRIIRLKTAALFAAAPLLG 160 (298) T ss_pred CCCHHHHHHHHHHHHHHHHHCCCCCHHHHHHHHHHHHHHHHHHHHHHHHCCCCCCCCHHHHHHHHHHHHHHHHHHHHHHH T ss_conf 64414889999999999986799220999999999999998888999863789999999999999999999999999999 Q ss_pred HHHHHHHHHHHHHHHHHHHHCCCHHHHHHHHHCCCCCCCCCCCHHHHHHHHCCCCCCCCHHHHCCCCCCCHHHHHHCCCC Q ss_conf 00112222101579999973111689887641123670003840123454213653210011014311000134320368 Q gi|254780755|r 181 SLIAGVQNSVRQALKSYGMNLGIAFQLVDDVLDYRGEVNEMGKNIGEDFRNGKPTLPVILAFQRGTKREKNFWKSTINDG 260 (322) Q Consensus 181 a~lag~~~~~~~~l~~fG~~lG~afQI~DD~ld~~g~~~~~GK~~g~Dl~egk~Tlpii~al~~~~~~~~~~l~~~~~~~ 260 (322) T Consensus 161 a~~~~~~~~~~~~l~~~g~~lG~aFQi~DD~ld~~g~~~~~GK~~g~Dl~eGk~Tlp~i~al~~~~~~~~~~~~~~~~~- 239 (298) T cd00685 161 ALLAGADEEEAEALKRFGRNLGLAFQIQDDILDLFGDPETLGKPVGSDLREGKCTLPVLLALERAPPEQRLLLELLLGK- 239 (298) T ss_pred HHHHCCCHHHHHHHHHHHHHHHHHHHHHHHHHHCCCCHHHHCCCCCCHHHCCCCHHHHHHHHHHCCHHHHHHHHHHHCC- T ss_conf 9983999999999999988768999999998742289788599843166569840999999987998779999986168- Q ss_pred CCCHHHHHHHHHHHHHCCHHHHHHHHHHHHHHHHHHHHHCCCCCHHHHHHHHHHHHHHCC Q ss_conf 999899999999999749699999999999999999842089998999999999999603 Q gi|254780755|r 261 KISVENLKKAFIIMRENRALVDTEYRAYSYGQKAKDSLRCLPDSSWKKSLMEVVDFCLQR 320 (322) Q Consensus 261 ~~~~~~~~~i~~ll~~~gai~~~~~~~~~~~~~A~~~L~~lp~~~~k~~L~~L~~~ii~R 320 (322) T Consensus 240 -~~~~~~~~v~~~i~~~g~~~~a~~~~~~~~~~A~~~L~~l~~~~~k~~L~~l~~~~~~R 298 (298) T cd00685 240 -GDEEDVEEARALVKKSGGIEYARELAREYEEKALEALKALPESPAREALRALADFILER 298 (298) T ss_pred -CCHHHHHHHHHHHHHCCHHHHHHHHHHHHHHHHHHHHHCCCCCHHHHHHHHHHHHHHCC T ss_conf -99999999999999869699999999999999999987399978999999999998629

HHsearch alignment for GI: 254780755 and conserved domain: cd00685