Entry
Name
UDP-N-acetylglucosamine 4,6-dehydratase (configuration-inverting);
FlaA1;
UDP-N-acetylglucosamine 5-inverting 4,6-dehydratase;
PseB;
UDP-N-acetylglucosamine hydro-lyase (inverting;
UDP-2-acetamido-2,6-dideoxy-beta-L-arabino-hex-4-ulose-forming)
Class
Lyases;
Carbon-oxygen lyases;
Hydro-lyases
BRITE hierarchy
Sysname
UDP-N-acetyl-alpha-D-glucosamine hydro-lyase (inverting; UDP-2-acetamido-2,6-dideoxy-beta-L-arabino-hex-4-ulose-forming)
Reaction(IUBMB)
UDP-N-acetyl-alpha-D-glucosamine = UDP-2-acetamido-2,6-dideoxy-beta-L-arabino-hex-4-ulose + H2O [RN:
R09697 ]
Reaction(KEGG)
Substrate
UDP-N-acetyl-alpha-D-glucosamine [CPD:
C00043 ]
Product
UDP-2-acetamido-2,6-dideoxy-beta-L-arabino-hex-4-ulose [CPD:
C19823 ];
H2O [CPD:
C00001 ]
Comment
Contains NADP+ as a cofactor. This is the first enzyme in the biosynthetic pathway of pseudaminic acid [3], a sialic-acid-like sugar that is unique to bacteria and is used by Helicobacter pylori to modify its flagellin. This enzyme plays a critical role in H. pylori's pathogenesis, being involved in the synthesis of both functional flagella and lipopolysaccharides [1,2]. It is completely inhibited by UDP-alpha-D-galactose. The reaction results in the chirality of the C-5 atom being inverted. It is thought that Lys-133 acts sequentially as a catalytic acid, protonating the C-6 hydroxy group and as a catalytic base, abstracting the C-5 proton, resulting in the elimination of water. This enzyme belongs to the short-chain dehydrogenase/reductase family of enzymes.
History
EC 4.2.1.115 created 2009
Pathway
ec00520 Amino sugar and nucleotide sugar metabolism
ec00541 O-Antigen nucleotide sugar biosynthesis
Orthology
K15894 UDP-N-acetylglucosamine 4,6-dehydratase/5-epimerase
K24336 UDP-N-acetylglucosamine 4,6-dehydratase
Genes
ECOO : ECRM13514_2754(fnlA)
ECOH : ECRM13516_2622(fnlA)
ECAN : CWI88_07845 CWI88_07910(fnlA)
CIE : AN232_13730(fnlA) AN232_31055(fnlA)
PSHI : SAMEA2665130_0849(capD_2)
PDAG : 4362423_00269(wbjB)
LLZ : LYB30171_02308(capD)
VPL : SA104470976_02489(pseB)
GHO : AL542_04195(pseB) AL542_05070(pseB)
SPRO : N7E60_09575 N7E60_09890(pseB)
PAEB : NCGM1900_3147(wbjB)
PPRC : PFLCHA0_c16590(capD1)
PPUU : PputUW4_01376(capD1)
PCAS : LOY40_20470(pseB) LOY40_20985(pseB)
PTW : TUM18999_39480(pseB)
PPHN : HU825_03185(pseB) HU825_12140(pseB)
SBP : Sbal223_1396 Sbal223_1480
SCAA : TUM17387_13590(pseB)
AGAR : OAG1_15510(pseB_1) OAG1_16280(pseB_2)
ASEM : NNL22_10185 NNL22_10260
PMAW : MACH26_31910(fnlA) MACH26_33170(pseB)
LLG : 44548918_01789(capD1)
LJR : NCTC11533_01926(capD_2)
LWA : SAMEA4504053_1075(capD_1)
LADL : NCTC12735_01327(capD_1)
TIB : THMIRHAM_04760(pseB)
TZO : THMIRHAT_08270(pseB)
TFRI : Thiofri_04695(pseB)
GAI : IMCC3135_22520(capD)
PAUR : FGL86_11200(pseB) FGL86_13940(pseB)
MPRF : J8N69_05380 J8N69_11800(pseB)
AHJ : V469_07080 V469_13790
ADH : CK627_03005(pseB) CK627_17490
AEL : NCTC12917_01571(capD)
CDIZ : CEDIAZO_01283(pseB)
ECOR : SAMEA4412678_0519(capD)
ACRS : LVJ80_06735 LVJ80_07155(pseB)
BTRM : SAMEA390648700510(capD)
THAG : CKCBHOJB_01688(pseB)
SPSE : SULPSESMR1_04926(pseB)
SFLA : SPHFLASMR4Y_02429(capD)
TII : DY252_04930 DY252_05005
PEL : SAR11G3_00045 SAR11G3_00103
HPO : HMPREF4655_20756(pseB)
HPX : HMPREF0462_0567(pseB)
HCL : NCTC13205_00345(flaA1)
HSH : NHP194022_01550(pseB)
HPUL : NCTC13154_00176(flaA1_2)
CJV : MTVDSCj20_1299(pseB)
CFV : CFVI03293_1657(pseB)
CAMP : CFT03427_1585(pseB)
CLR : UPTC16701_1281(pseB)
CLM : UPTC16712_1300(pseB)
CAMR : CAQ16704_1310(pseB)
CHV : CHELV3228_0315(pseB)
CPIN : CPIN18020_0090(pseB)
CAMZ : CVIC12175_1417(pseB)
AMYT : AMYT_0882 AMYT_0910
GEO : Geob_1458(wbjB-1) Geob_2134(wbjB-2)
DMM : dnm_039420(pseB) dnm_097000
BSON : S101395_00295(capD) S101395_02428
BSM : BSM4216_0908 BSM4216_3298
BFD : NCTC4823_03152(capD_1)
BKO : CKF48_08450 CKF48_22500
ACAI : ISX45_09970 ISX45_14180(pseB)
LFU : HR49_09255 HR49_20315
LYB : C3943_04115(pseB) C3943_13975
LYZ : DCE79_04805 DCE79_08205
LPAK : GDS87_03470 GDS87_14805
LAGR : FJQ98_04025(pseB) FJQ98_17550
LIU : OU989_02965(pseB) OU989_13605
TAID : KS242_15645 KS242_17530
BMUR : ABE28_012595 ABE28_016010
PPSR : I6J18_08575(pseB) I6J18_19575
PERI : RE409_19685 RE409_30240(pseB)
GCS : MUN88_00130 MUN88_20040(pseB)
MSEM : GMB29_05240 GMB29_25220
ALKG : MOJ78_08755 MOJ78_19170(pseB)
SAX : USA300HOU_0167(cap5E)
SAA : SAUSA300_0156(cap5E)
SUJ : SAA6159_00137(cap8E)
SUK : SAA6008_00131(cap5E)
SUX : SAEMRSA15_01190(capE)
SUF : SARLGA251_01270(capE)
SAUT : SAI1T1_2001080(capE)
SAUJ : SAI2T2_1001080(capE)
SAUK : SAI3T3_1001080(capE)
SAUQ : SAI4T8_1001080(capE)
SAUV : SAI7S6_1001080(capE)
SAUW : SAI5S5_1001070(capE)
SAUX : SAI6T6_1001080(capE)
SAUY : SAI8T7_1001080(capE)
SSH : NCTC13712_00108(capD_2)
LGZ : NCTC10812_01731(capD_1)
EAP : KB235_04660 KB235_04845
PAEF : R50345_25355 R50345_30120
PAEH : H70357_28060 H70357_28685
PAEJ : H70737_24335 H70737_25150 H70737_29770
PSON : JI735_02865 JI735_06105
PDH : B9T62_25310 B9T62_25815
PPSC : EHS13_00590 EHS13_05280(pseB) EHS13_08470
PMAH : PTQ21_07510 PTQ21_30780
PMAE : LMZ02_29795 LMZ02_30105
PWN : QNH46_06855 QNH46_06895
PLZH : C0638_13335 C0638_13640
TCO : Theco_0165 Theco_1160
COHN : KCTCHS21_11780(pseB) KCTCHS21_44070
CHEB : HH215_13295 HH215_21890 HH215_31130(pseB)
COHL : J4772_19825 J4772_24325
SOB : CSE16_04870 CSE16_11405
VIJ : JNUCC6_03920 JNUCC6_18315(pseB)
JAR : G7057_08175 G7057_08360
CCOH : SAMEA4530647_1494(capD_1)
CGEL : psyc5s11_50960(capE)
RHER : EHE19_000730(pseB) EHE19_018935
PALM : RBG61_05070(pseB) RBG61_13220
MFOR : NQ534_01365 NQ534_01405
CBIL : EUBC25_01590 EUBC25_21140
CBAR : PATL70BA_0363(capD)
PBIF : KXZ80_05450(pseB) KXZ80_09585
IFN : GM661_02575(pseB) GM661_06660
ERL : AOC36_02520 AOC36_08485
EIO : H9L01_00370 H9L01_07860
TSF : NQ543_04000 NQ543_06850 NQ543_08045
AAXA : NCTC10138_00336(capD_1)
AMAU : DSM26151_09080(pseB)
PSNI : NIBR502771_09620(pseB)
RSA : RSal33209_1338(capE)
DCO : SAMEA4475696_2246(capD_2)
RAIN : Rai3103_07960(pseB)
MICH : FJK98_09690(pseB) FJK98_09975
MCAB : HXZ27_10700(pseB) HXZ27_11015 HXZ27_11115
MSAG : GCM10017556_43930(wbjB)
VER : HUT12_09855(pseB) HUT12_10140
MENO : Jiend_08490(fnlA) Jiend_09170(rkpL)
MPRN : Q3V37_27860 Q3V37_28115(pseB)
ACTR : Asp14428_41440(rkpL) Asp14428_57050(wbjB)
PLK : CIK06_10360 CIK06_15465(pseB)
ABAM : B1s21122_06300(pseB)
PRUN : PCC7821_02756(pseB)
OBG : Verru16b_02062(capD)
LAJ : A0128_07415 A0128_07535
FSU : Fisuc_2683 Fisuc_2693
BTHO : Btheta7330_01875(capD_1) Btheta7330_02107(capD_2) Btheta7330_02999(capD_3)
BFR : BF1106 BF1844 BF2570
BFG : BF638R_1088 BF638R_1878 BF638R_3768 BF638R_3770
BFB : VU15_04770 VU15_07835
BHL : Bache_1938 Bache_2242
BCEL : BcellWH2_04977(capD)
BHF : C3V43_13530 C3V43_13545(pseB)
BFE : K6V30_14840 K6V30_24445
BHUM : JXR92_011935(pseB) JXR92_012455
BVU : BVU_0695 BVU_1481 BVU_1539
PARC : CI960_11595(pseB) CI960_13490
PGOL : K6V26_10525 K6V26_11955
OSP : Odosp_0119 Odosp_3025
BFH : F1611_15575 F1611_19165
RBC : BN938_0770 BN938_1654 BN938_1960
PSEZ : HME7025_02510(wbpP)
TMAR : MARIT_1562(pseB) MARIT_2532(flnA)
KAN : IMCC3317_43200(pseB)
CGLE : NCTC11432_02312(capD_1)
CTAI : NCTC12078_01307(capD_1)
CTAK : 4412677_01082(capD_1)
CSAL : NBC122_00354(capD_1) NBC122_02871(capD_2)
CJG : NCTC13459_02731(capD_3)
CANT : NCTC13489_01524(capD_1)
NLI : G3M70_09910(pseB) G3M70_09935 G3M70_16020
NIN : NADRNF5_2119(pseB) NADRNF5_2153
NUE : C5F50_00705 C5F50_00940
» show all
Taxonomy
Reference
Authors
Ishiyama N, Creuzenet C, Miller WL, Demendi M, Anderson EM, Harauz G, Lam JS, Berghuis AM
Title
Structural studies of FlaA1 from Helicobacter pylori reveal the mechanism for inverting 4,6-dehydratase activity.
Journal
Sequence
Reference
Authors
Schirm M, Soo EC, Aubry AJ, Austin J, Thibault P, Logan SM
Title
Structural, genetic and functional characterization of the flagellin glycosylation process in Helicobacter pylori.
Journal
Sequence
Reference
Authors
Schoenhofen IC, McNally DJ, Brisson JR, Logan SM
Title
Elucidation of the CMP-pseudaminic acid pathway in Helicobacter pylori: synthesis from UDP-N-acetylglucosamine by a single enzymatic reaction.
Journal
Sequence
Other DBs
ExPASy - ENZYME nomenclature database: 4.2.1.115
LinkDB
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