Entry
Name
2-hydroxyisobutanoyl-CoA mutase;
hcmAB (gene names)
Class
Isomerases;
Intramolecular transferases;
Transferring other groups
BRITE hierarchy
Sysname
2-hydroxy-2-methylpropanoyl-CoA mutase
Reaction(IUBMB)
2-hydroxy-2-methylpropanoyl-CoA = (S)-3-hydroxybutanoyl-CoA [RN:
R11334 ]
Reaction(KEGG)
Substrate
2-hydroxy-2-methylpropanoyl-CoA [CPD:
C21287 ]
Product
(S)-3-hydroxybutanoyl-CoA [CPD:
C01144 ]
Comment
The enzyme, characterized from the bacterium Aquincola tertiaricarbonis, uses radical chemistry to rearrange the positions of both a methyl group and a hydroxyl group. It consists of two subunits, the smaller one containing a cobalamin cofactor. It plays a central role in the degradation of assorted substrates containing a tert-butyl moiety.
History
EC 5.4.99.64 created 2016 as EC 5.3.3.20, transferred 2017 to EC 5.4.99.64
Orthology
K20906 2-hydroxyisobutanoyl-CoA mutase large subunit
K20907 2-hydroxyisobutanoyl-CoA mutase small subunit
Genes
MSR : AU15_14560 AU15_14575
MARA : D0851_19615 D0851_19630
MMEE : NLK58_20450 NLK58_20465
RSH : Rsph17029_3654 Rsph17029_3657
RSK : RSKD131_3113 RSKD131_3116
MGO : AFA91_20165 AFA91_20185
SMAL : SMALA_1326 SMALA_1329
SSOI : I1A49_10170 I1A49_10185
SAUO : BV401_10440 BV401_10455
SARM : DVA86_08785 DVA86_08800
ORN : DV701_11560 DV701_11575
AACD : LWP59_23660 LWP59_23675
ARHD : VSH64_11700 VSH64_11715
ACAB : QRX50_34000 QRX50_34015
PMAD : BAY61_27485 BAY61_27500
» show all
Taxonomy
Reference
Authors
Yaneva N, Schuster J, Schafer F, Lede V, Przybylski D, Paproth T, Harms H, Muller RH, Rohwerder T
Title
Bacterial acyl-CoA mutase specifically catalyzes coenzyme B12-dependent isomerization of 2-hydroxyisobutyryl-CoA and (S)-3-hydroxybutyryl-CoA.
Journal
Sequence
Reference
Authors
Kurteva-Yaneva N, Zahn M, Weichler MT, Starke R, Harms H, Muller RH, Strater N, Rohwerder T
Title
Structural basis of the stereospecificity of bacterial B12-dependent 2-hydroxyisobutyryl-CoA mutase.
Journal
Sequence
Other DBs
ExPASy - ENZYME nomenclature database: 5.4.99.64
LinkDB
All DBs