>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=368.99 Aligned_cols=193 Identities=40% Similarity=0.594 Sum_probs=173.2 Q ss_pred CHHHHHHHHHHC-CCCCHHHHHHHHHHHHHCCCCC-CCCCCHHHHHHHHHHHHHHHCCCCCCCCCCCCCCCCCCCCCCCC Q ss_conf 157999998750-5860079999999999617882-22240246888899999864776544532234455665432434 Q gi|254781111|r 36 NDRLLSAIRYAL-LGGKKIRSFLVTECASLFNVNH-LTALRVGAAIECIHCYSLIHDDLPSMDNGYIRRGKPTVHIQYDE 113 (237) Q Consensus 36 ~~~l~~~~~y~l-~gGKr~R~~l~l~~~~~~~~~~-~~~~~~AaavEllH~asLihDDI~~~D~s~~RRG~pt~h~~~G~ 113 (237) T Consensus 3 ~~~l~~~~~y~~~~gGKrlRp~l~ll~~~~~~~~~~~~~~~~A~aiEliH~asLiHDDi--iD~s~~RRG~pt~h~~~g~ 80 (298) T cd00685 3 VELLREALRYLLLAGGKRLRPLLVLLAARALGGPELEAALRLAAAIELLHTASLVHDDV--MDNSDLRRGKPTVHKVFGN 80 (298) T ss_pred CHHHHHHHHHHHCCCCCCHHHHHHHHHHHHHCCCCHHHHHHHHHHHHHHHHHHHHHHHH--HCCCCCCCCCCCHHHHCCC T ss_conf 38999999988638974387999999999819995688999999999999999998241--0586545899878887299 Q ss_pred CCCHHHHHHHHHHHHHHHHHHHCCCCHHHHHHHHHHHHHHHHHHHHHCCCCCCCCHH---HHHHHHHHHHHHHHHHHHHH Q ss_conf 520133222233479999731023412678888876532223566411332221000---00036799999998634899 Q gi|254781111|r 114 VTAIIAGNGLLTYAFEIISSPKTQLKDNIRSQLMLSLTHNIGLQGMLGGQMLDIQDE---FIDETQVFMIQKMKTGALMC 190 (237) Q Consensus 114 ~~AIl~Gd~l~~~a~~~l~~~~~~~~~~~~~~~~~~~~~~~~~~~l~~GQ~~dl~~~---~~~~~~y~~i~~~KTa~lf~ 190 (237) T Consensus 81 ~~AIl~GD~l~~~a~~~l~~~~~~----~~~~~~~~~~~~--~~~~~~Gq~~d~~~~~~~~~~~~~y~~~~~~KTa~l~~ 154 (298) T cd00685 81 ATAILAGDYLLARAFELLARLGNP----YYPRALELFSEA--ILELVEGQLLDLLSEYDTDVTEEEYLRIIRLKTAALFA 154 (298) T ss_pred CCCHHHHHHHHHHHHHHHHHCCCC----CHHHHHHHHHHH--HHHHHHHHHHHHHCCCCCCCCHHHHHHHHHHHHHHHHH T ss_conf 644148899999999999867992----209999999999--99998888999863789999999999999999999999 Q ss_pred HHHHHHHHHCCCCHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH---CC Q ss_conf 99999999759888999999999999849999986765344320---67 Q gi|254781111|r 191 FACESGAIMAHASQNEKERLRCFGENLGIIFQLADDLLDCEEDL---PK 236 (237) Q Consensus 191 ~~~~~ga~lag~~~~~~~~l~~~g~~lGiafQi~DD~lD~~~D~---~k 236 (237) T Consensus 155 ~~~~~ga~~~~~~~~~~~~l~~~g~~lG~aFQi~DD~ld~~g~~~~~GK 203 (298) T cd00685 155 AAPLLGALLAGADEEEAEALKRFGRNLGLAFQIQDDILDLFGDPETLGK 203 (298) T ss_pred HHHHHHHHHHCCCHHHHHHHHHHHHHHHHHHHHHHHHHHCCCCHHHHCC T ss_conf 9999999983999999999999988768999999998742289788599

HHsearch alignment for GI: 254781111 and conserved domain: cd00685