Entry
Name
germacradienol synthase;
germacradienol/germacrene-D synthase;
2-trans,6-trans-farnesyl-diphosphate diphosphate-lyase [(1E,4S,5E,7R)-germacra-1(10),5-dien-11-ol-forming]
Class
Lyases;
Carbon-oxygen lyases;
Acting on phosphates
BRITE hierarchy
Sysname
(2E,6E)-farnesyl-diphosphate diphosphate-lyase [(1E,4S,5E,7R)-germacra-1(10),5-dien-11-ol-forming]
Reaction(IUBMB)
(2E,6E)-farnesyl diphosphate + H2O = (1E,4S,5E,7R)-germacra-1(10),5-dien-11-ol + diphosphate [RN:
R07647 ]
Reaction(KEGG)
Substrate
Product
(1E,4S,5E,7R)-germacra-1(10),5-dien-11-ol [CPD:
C16143 ];
diphosphate [CPD:
C00013 ]
Comment
Requires Mg2+ for activity. H-1si of farnesyl diphosphate is lost in the formation of (1E,4S,5E,7R)-germacra-1(10),5-dien-11-ol. Formation of (-)-germacrene D involves a stereospecific 1,3-hydride shift of H-1si of farnesyl diphosphate. Both products are formed from a common intermediate [2]. Other enzymes produce germacrene D as the sole product using a different mechanism. The enzyme mediates a key step in the biosynthesis of geosmin (see EC
4.1.99.16 geosmin synthase), a widely occurring metabolite of many streptomycetes, bacteria and fungi [2]. Also catalyses the reaction of EC
4.2.3.75 , (-)-germacrene D synthase.
History
EC 4.2.3.22 created 2006, modified 2011
Pathway
ec00909 Sesquiterpenoid and triterpenoid biosynthesis
ec01110 Biosynthesis of secondary metabolites
Orthology
K10187 germacradienol/geosmin synthase
Genes
AGE : AA314_02305 AA314_08732
NANN : O0S08_24410 O0S08_35550
SLE : sle_16070(sle_16070)
SALW : CP975_28380 CP975_33095
SGM : GCM10017557_17550(cyc2)
STUI : GCM10017668_55740(cyc2)
SGOB : test1122_08905 test1122_25330
SXT : KPP03845_105794(cyc2_1)
STII : DRB96_29850 DRB96_30335
KIT : CFP65_0675 CFP65_6829
SPIQ : OHA34_15550 OHA34_15730
NGN : LCN96_09125 LCN96_54695
SEN : SACE_3187 SACE_3977 SACE_4907
» show all
Taxonomy
Reference
Authors
Cane DE, Watt RM.
Title
Expression and mechanistic analysis of a germacradienol synthase from Streptomyces coelicolor implicated in geosmin biosynthesis.
Journal
Sequence
Reference
Authors
He X, Cane DE.
Title
Mechanism and stereochemistry of the germacradienol/germacrene D synthase of Streptomyces coelicolor A3(2).
Journal
Sequence
Reference
Authors
Gust B, Challis GL, Fowler K, Kieser T, Chater KF
Title
PCR-targeted Streptomyces gene replacement identifies a protein domain needed for biosynthesis of the sesquiterpene soil odor geosmin.
Journal
Sequence
Other DBs
ExplorEnz - The Enzyme Database: 4.2.3.22
ExPASy - ENZYME nomenclature database: 4.2.3.22
LinkDB
All DBs