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
ec00541 Biosynthesis of various nucleotide sugars
Orthology
K15894 UDP-N-acetylglucosamine 4,6-dehydratase
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)
KCA : AAEY27_08215 AAEY27_08275(fnlA)
PSHI : SAMEA2665130_0849(capD_2)
PDAG : 4362423_00269(wbjB)
LLZ : LYB30171_02308(capD)
VCZ : VAB027_3592 VAB027_3605
VVM : VVMO6_02770 VVMO6_02807
VVL : VV93_v1c02990 VV93_v1c03300
VAQ : FIV01_00025(pglF1) FIV01_00105(pseB)
VPL : SA104470976_02489(pseB)
VLE : ISX51_00435 ISX51_00540
VFI : VF_0140 VF_0191(fnlA)
VSA : VSAL_I0172 VSAL_I0251
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)
PMOR : PMm318_A57140(pseB)
MLQ : ASQ50_04335 ASQ50_04400
MFLI : ACGK9W_09780(pseB) ACGK9W_09870(pseB)
SBP : Sbal223_1396 Sbal223_1480
SKH : STH12_02028(pglF_2) STH12_02114(pseB)
SCAA : TUM17387_13590(pseB)
SSPA : K0I31_06605(pseB) K0I31_07115
PIA : PI2015_0470 PI2015_2205
PRR : AT705_09960 AT705_18710
PSAZ : PA25_03940 PA25_10850
PMAZ : R5H13_02760 R5H13_06460(pseB)
AGAR : OAG1_15510(pseB_1) OAG1_16280(pseB_2)
ASEM : NNL22_10185 NNL22_10260
PMAW : MACH26_31910(fnlA) MACH26_33170(pseB)
MMAA : FR932_21235 FR932_21305(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
AAJ : BOQ57_08340 BOQ57_14825
ADH : CK627_03005(pseB) CK627_17490
ACAV : VI35_07480(pseB) VI35_13890
AEM : CK911_04520 CK911_10475
AEL : NCTC12917_01571(capD)
ASIM : FE240_05775(pseB) FE240_10095
CDIZ : CEDIAZO_01283(pseB)
ECOR : SAMEA4412678_0519(capD)
ACRS : LVJ80_06735 LVJ80_07155(pseB)
BTRM : SAMEA390648700510(capD)
THAG : CKCBHOJB_01688(pseB)
CAUB : AMEJIAPC_04090(pseB)
SPSE : SULPSESMR1_04926(pseB)
SFLA : SPHFLASMR4Y_02429(capD)
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)
HFI : NHP21005_04540(pseB)
HGA : NHP190012_11460(pseB)
HGS : NHP190003_06080(pseB)
SULR : B649_00715 B649_08575
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
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
BACE : H1A11_05340 H1A11_05670(pseB)
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
CBAM : PIECOFPK_01659(capD)
PSEZ : HME7025_02510(wbpP)
CNQ : PZB72_13080(pseB) PZB72_27870
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
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
LYQ : MY533_02460(pseB) MY533_13155
LYO : NV349_03240(pseB) NV349_13510
PPSR : I6J18_08575(pseB) I6J18_19575
PERI : RE409_19685 RE409_30240(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
COHN : KCTCHS21_11780(pseB)
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
OKO : Ruko_12050 Ruko_34090
MFOR : NQ534_01365 NQ534_01405
CBIL : EUBC25_01590 EUBC25_21140
CBAR : PATL70BA_0363(capD)
AHAD : FRZ06_18300 FRZ06_19035
PBIF : KXZ80_05450(pseB) KXZ80_09585
SELM : TAMA11512_02890(pseB)
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)
» 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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