obsolete trans-2-methyl-5-isopropylhexa-2,5-dienoate-CoA ligase activity (obsolete GO:0034943)
OBSOLETE. Catalysis of the reaction: trans-2-methyl-5-isopropylhexa-2,5-dienoic acid + ATP + CoASH = trans-2-methyl-5-isopropylhexa-2,5-dienoyl-CoA + AMP + PPi.