>TIGR02415 23BDH acetoin reductases; InterPro: IPR014007 One member of this family, as characterised in Klebsiella terrigena , is able to interconvert acetoin + NADH with meso-2,3-butanediol + NAD(+). It is also capable of irreversible reduction of diacetyl with NADH to acetoin. There has been a reuctance to classify the enzyme as either 1.1.1.4 from EC, which is (R,R)-butanediol dehydrogenase, or 1.1.1.5 from EC, which is acetoin dehydrogenase without a specified stereochemistry . Another member of this family, from Corynebacterium glutamicum (Brevibacterium flavum), is called L-2,3-butanediol dehydrogenase . This enzyme is a homotetramer in the family of short chain dehydrogenases (IPR002198 from INTERPRO). .

Probab=94.47 E-value=0.22 Score=27.40 Aligned_cols=182 Identities=19% Similarity=0.133 Sum_probs=94.5 Q ss_pred EEECC-CHHHHHHHHHHHHCCCEEEEEECC--HHH----HHHHHHCCCEEEE-CCCCCCCHHHH-------HHHCCCCEE Q ss_conf 99888-888999999999889889999679--446----3455644982898-06786402346-------541156327 Q gi|254780595|r 4 MIFGA-GYTGKFIADAALKVGVYTCGTTRS--VSN----LLTLKHKGISPFL-FADQKINNLLR-------EKLYFTTHI 68 (289) Q Consensus 4 lI~Ga-G~iG~~l~~~L~~~g~~V~~~~r~--~~~----~~~l~~~~~~~~~-~~~~~~~~~~~-------~~~~~~~~v 68 (289) T Consensus 4 lvTGgAqGIG~gIa~RLa~DGF~vav~D~n~Qe~~A~~t~~~i~~~G~~Ava~~~DV~~k~~~~~~i~~A~~~fG~fdV~ 83 (258) T TIGR02415 4 LVTGGAQGIGKGIAERLAKDGFNVAVADLNNQEETAKETAKEINQKGGKAVAYKLDVSDKSQVFEAIDQAVEKFGGFDVM 83 (258) T ss_pred EEECCCCCHHHHHHHHHHHCCCEEEEECCCCCHHHHHHHHHHHHHCCCEEEEEECCCCCHHHHHHHHHHHHHHCCCCEEE T ss_conf 78568543238999999834613787256663689999999998669737998647345678999999999970893278 Q ss_pred EEEECC-----CCC--CCEEECCCCCHHH-------HH------HHCC-CCCCCCCCEEECCCCCCCCCCCCCCCCCCCH Q ss_conf 876124-----443--3100012210134-------43------2012-3343333201025762123453211234311 Q gi|254780595|r 69 VQCIKP-----SSE--GDPCIISMSKDFY-------KF------MPHV-KWIGYLSSTSIYGNREGQWVDEHSFVHPISC 127 (289) Q Consensus 69 ~~~~~~-----~~~--~~~~~~~~~~~~~-------~~------~~~~-~~~i~~SS~~VYg~~~g~~i~E~~~~~P~~~ 127 (289) T Consensus 84 VNNAGva~~~pi~~iteE~l~k~y~vNV~GvlfGIQAA~~~Fkk~~~~tGkIINAaSiA--g~-~G------~p--~ls~ 152 (258) T TIGR02415 84 VNNAGVAPVTPILEITEEELEKLYNVNVKGVLFGIQAAARQFKKQGHGTGKIINAASIA--GV-EG------NP--VLSA 152 (258) T ss_pred EECCCCCCCCCCCCCCCHHHHHHHCCHHHHHHHHHHHHHHHHHHCCCCCCCHHHHHHHH--HH-HC------CH--HHHH T ss_conf 65241000277454670034234301014566788999987787168987115776575--54-04------41--4677 Q ss_pred HHHHHHHHH----HHHHHCCCCCCCCCCCCCCCCCCCCC--CCHHH-----HHHCCCC-CCCCCCC-CEECCHH------ Q ss_conf 345544555----54320012345676420347777898--50344-----4311345-4322211-0001024------ Q gi|254780595|r 128 VATQRFNAE----KEWLAITKKLNIKLAVLRLSGIYGPK--RNPFI-----KIRQKNS-LRLVKKN-QVFNRIR------ 188 (289) Q Consensus 128 y~~~k~~~E----~~~~~~~~~~~~~~~ilR~~~iyGp~--r~~~~-----~~~~g~~-~~~~~~~-~~~~~ih------ 188 (289) T Consensus 153 YsstKFAVRgLTQtAA~eLA~~-GITV------NaYcPGiV~T~M~~~Id~~~~~~~gSk~i~~~~~~fss~I~LGR~~~ 225 (258) T TIGR02415 153 YSSTKFAVRGLTQTAAQELAPK-GITV------NAYCPGIVKTEMWEEIDEKTVELAGSKPIGEGFEEFSSEIKLGRLSE 225 (258) T ss_pred HHHHHHHHHHHHHHHHHHHHHC-CCEE------CCCCCCCCCCHHHHHHHHHHHHHCCCCCHHHHHHHHHHHCCCCCCCC T ss_conf 7767888876579999997524-8737------44088865054179999999873277006789999875313798999 Q ss_pred HHHHHHHHHHHHCCC Q ss_conf 777799999995135 Q gi|254780595|r 189 VEDVARCVIFLMTHH 203 (289) Q Consensus 189 v~Dva~~i~~l~~~~ 203 (289) T Consensus 226 PeDVA~lVSFLAS~d 240 (258) T TIGR02415 226 PEDVAGLVSFLASED 240 (258) T ss_pred CCHHHHHHHHHCCCC T ss_conf 713887889851476

HHsearch alignment for GI: 254780595 and conserved domain: TIGR02415