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ARNA_ENT38
ID   ARNA_ENT38              Reviewed;         660 AA.
AC   A4WAM3;
DT   05-FEB-2008, integrated into UniProtKB/Swiss-Prot.
DT   29-MAY-2007, sequence version 1.
DT   03-AUG-2022, entry version 105.
DE   RecName: Full=Bifunctional polymyxin resistance protein ArnA {ECO:0000255|HAMAP-Rule:MF_01166};
DE   Includes:
DE     RecName: Full=UDP-4-amino-4-deoxy-L-arabinose formyltransferase {ECO:0000255|HAMAP-Rule:MF_01166};
DE              EC=2.1.2.13 {ECO:0000255|HAMAP-Rule:MF_01166};
DE     AltName: Full=ArnAFT {ECO:0000255|HAMAP-Rule:MF_01166};
DE     AltName: Full=UDP-L-Ara4N formyltransferase {ECO:0000255|HAMAP-Rule:MF_01166};
DE   Includes:
DE     RecName: Full=UDP-glucuronic acid oxidase, UDP-4-keto-hexauronic acid decarboxylating {ECO:0000255|HAMAP-Rule:MF_01166};
DE              EC=1.1.1.305 {ECO:0000255|HAMAP-Rule:MF_01166};
DE     AltName: Full=ArnADH {ECO:0000255|HAMAP-Rule:MF_01166};
DE     AltName: Full=UDP-GlcUA decarboxylase {ECO:0000255|HAMAP-Rule:MF_01166};
DE     AltName: Full=UDP-glucuronic acid dehydrogenase {ECO:0000255|HAMAP-Rule:MF_01166};
GN   Name=arnA {ECO:0000255|HAMAP-Rule:MF_01166}; OrderedLocusNames=Ent638_2077;
OS   Enterobacter sp. (strain 638).
OC   Bacteria; Proteobacteria; Gammaproteobacteria; Enterobacterales;
OC   Enterobacteriaceae; Enterobacter.
OX   NCBI_TaxID=399742;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=638;
RX   PubMed=20485560; DOI=10.1371/journal.pgen.1000943;
RA   Taghavi S., van der Lelie D., Hoffman A., Zhang Y.B., Walla M.D.,
RA   Vangronsveld J., Newman L., Monchy S.;
RT   "Genome sequence of the plant growth promoting endophytic bacterium
RT   Enterobacter sp. 638.";
RL   PLoS Genet. 6:E1000943-E1000943(2010).
CC   -!- FUNCTION: Bifunctional enzyme that catalyzes the oxidative
CC       decarboxylation of UDP-glucuronic acid (UDP-GlcUA) to UDP-4-keto-
CC       arabinose (UDP-Ara4O) and the addition of a formyl group to UDP-4-
CC       amino-4-deoxy-L-arabinose (UDP-L-Ara4N) to form UDP-L-4-formamido-
CC       arabinose (UDP-L-Ara4FN). The modified arabinose is attached to lipid A
CC       and is required for resistance to polymyxin and cationic antimicrobial
CC       peptides. {ECO:0000255|HAMAP-Rule:MF_01166}.
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=NAD(+) + UDP-alpha-D-glucuronate = CO2 + NADH + UDP-beta-L-
CC         threo-pentopyranos-4-ulose; Xref=Rhea:RHEA:24702, ChEBI:CHEBI:16526,
CC         ChEBI:CHEBI:57540, ChEBI:CHEBI:57945, ChEBI:CHEBI:58052,
CC         ChEBI:CHEBI:58710; EC=1.1.1.305; Evidence={ECO:0000255|HAMAP-
CC         Rule:MF_01166};
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=(6S)-10-formyltetrahydrofolate + UDP-4-amino-4-deoxy-beta-L-
CC         arabinose = (6S)-5,6,7,8-tetrahydrofolate + H(+) + UDP-4-deoxy-4-
CC         formamido-beta-L-arabinose; Xref=Rhea:RHEA:24706, ChEBI:CHEBI:15378,
CC         ChEBI:CHEBI:57453, ChEBI:CHEBI:57454, ChEBI:CHEBI:58708,
CC         ChEBI:CHEBI:58709; EC=2.1.2.13; Evidence={ECO:0000255|HAMAP-
CC         Rule:MF_01166};
CC   -!- PATHWAY: Nucleotide-sugar biosynthesis; UDP-4-deoxy-4-formamido-beta-L-
CC       arabinose biosynthesis; UDP-4-deoxy-4-formamido-beta-L-arabinose from
CC       UDP-alpha-D-glucuronate: step 1/3. {ECO:0000255|HAMAP-Rule:MF_01166}.
CC   -!- PATHWAY: Nucleotide-sugar biosynthesis; UDP-4-deoxy-4-formamido-beta-L-
CC       arabinose biosynthesis; UDP-4-deoxy-4-formamido-beta-L-arabinose from
CC       UDP-alpha-D-glucuronate: step 3/3. {ECO:0000255|HAMAP-Rule:MF_01166}.
CC   -!- PATHWAY: Bacterial outer membrane biogenesis; lipopolysaccharide
CC       biosynthesis. {ECO:0000255|HAMAP-Rule:MF_01166}.
CC   -!- SUBUNIT: Homohexamer, formed by a dimer of trimers. {ECO:0000255|HAMAP-
CC       Rule:MF_01166}.
CC   -!- SIMILARITY: In the N-terminal section; belongs to the Fmt family. UDP-
CC       L-Ara4N formyltransferase subfamily. {ECO:0000255|HAMAP-Rule:MF_01166}.
CC   -!- SIMILARITY: In the C-terminal section; belongs to the NAD(P)-dependent
CC       epimerase/dehydratase family. UDP-glucuronic acid decarboxylase
CC       subfamily. {ECO:0000255|HAMAP-Rule:MF_01166}.
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DR   EMBL; CP000653; ABP60753.1; -; Genomic_DNA.
DR   RefSeq; WP_012017468.1; NC_009436.1.
DR   AlphaFoldDB; A4WAM3; -.
DR   SMR; A4WAM3; -.
DR   STRING; 399742.Ent638_2077; -.
DR   EnsemblBacteria; ABP60753; ABP60753; Ent638_2077.
DR   KEGG; ent:Ent638_2077; -.
DR   eggNOG; COG0223; Bacteria.
DR   eggNOG; COG0451; Bacteria.
DR   HOGENOM; CLU_007383_23_2_6; -.
DR   OMA; VRYCVKY; -.
DR   OrthoDB; 2009156at2; -.
DR   UniPathway; UPA00030; -.
DR   UniPathway; UPA00032; UER00492.
DR   UniPathway; UPA00032; UER00494.
DR   Proteomes; UP000000230; Chromosome.
DR   GO; GO:0016831; F:carboxy-lyase activity; IEA:InterPro.
DR   GO; GO:0099619; F:UDP-4-amino-4-deoxy-L-arabinose formyltransferase activity; IEA:UniProtKB-EC.
DR   GO; GO:0099618; F:UDP-glucuronic acid dehydrogenase activity; IEA:UniProtKB-EC.
DR   GO; GO:0009245; P:lipid A biosynthetic process; IEA:UniProtKB-KW.
DR   GO; GO:0009103; P:lipopolysaccharide biosynthetic process; IEA:UniProtKB-UniPathway.
DR   GO; GO:0046677; P:response to antibiotic; IEA:UniProtKB-KW.
DR   CDD; cd05257; Arna_like_SDR_e; 1.
DR   HAMAP; MF_01166; ArnA; 1.
DR   InterPro; IPR045869; Arna-like_SDR_e.
DR   InterPro; IPR021168; Bifun_polymyxin_resist_ArnA.
DR   InterPro; IPR001509; Epimerase_deHydtase.
DR   InterPro; IPR005793; Formyl_trans_C.
DR   InterPro; IPR002376; Formyl_transf_N.
DR   InterPro; IPR036477; Formyl_transf_N_sf.
DR   InterPro; IPR011034; Formyl_transferase-like_C_sf.
DR   InterPro; IPR036291; NAD(P)-bd_dom_sf.
DR   Pfam; PF01370; Epimerase; 1.
DR   Pfam; PF02911; Formyl_trans_C; 1.
DR   Pfam; PF00551; Formyl_trans_N; 1.
DR   PIRSF; PIRSF036506; Bifun_polymyxin_resist_ArnA; 1.
DR   SUPFAM; SSF50486; SSF50486; 1.
DR   SUPFAM; SSF51735; SSF51735; 1.
DR   SUPFAM; SSF53328; SSF53328; 1.
PE   3: Inferred from homology;
KW   Antibiotic resistance; Lipid A biosynthesis; Lipid biosynthesis;
KW   Lipid metabolism; Lipopolysaccharide biosynthesis; Multifunctional enzyme;
KW   NAD; Oxidoreductase; Transferase.
FT   CHAIN           1..660
FT                   /note="Bifunctional polymyxin resistance protein ArnA"
FT                   /id="PRO_1000065676"
FT   REGION          1..304
FT                   /note="Formyltransferase ArnAFT"
FT   REGION          314..660
FT                   /note="Dehydrogenase ArnADH"
FT   ACT_SITE        104
FT                   /note="Proton donor; for formyltransferase activity"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01166"
FT   ACT_SITE        434
FT                   /note="Proton acceptor; for decarboxylase activity"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01166"
FT   ACT_SITE        619
FT                   /note="Proton donor; for decarboxylase activity"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01166"
FT   BINDING         114
FT                   /ligand="(6S)-10-formyltetrahydrofolate"
FT                   /ligand_id="ChEBI:CHEBI:57454"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01166"
FT   BINDING         136..140
FT                   /ligand="(6S)-10-formyltetrahydrofolate"
FT                   /ligand_id="ChEBI:CHEBI:57454"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01166"
FT   BINDING         347
FT                   /ligand="NAD(+)"
FT                   /ligand_id="ChEBI:CHEBI:57540"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01166"
FT   BINDING         368..369
FT                   /ligand="NAD(+)"
FT                   /ligand_id="ChEBI:CHEBI:57540"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01166"
FT   BINDING         393
FT                   /ligand="UDP-alpha-D-glucuronate"
FT                   /ligand_id="ChEBI:CHEBI:58052"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01166"
FT   BINDING         398
FT                   /ligand="UDP-alpha-D-glucuronate"
FT                   /ligand_id="ChEBI:CHEBI:58052"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01166"
FT   BINDING         432..433
FT                   /ligand="UDP-alpha-D-glucuronate"
FT                   /ligand_id="ChEBI:CHEBI:58052"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01166"
FT   BINDING         460
FT                   /ligand="UDP-alpha-D-glucuronate"
FT                   /ligand_id="ChEBI:CHEBI:58052"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01166"
FT   BINDING         492
FT                   /ligand="UDP-alpha-D-glucuronate"
FT                   /ligand_id="ChEBI:CHEBI:58052"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01166"
FT   BINDING         526..535
FT                   /ligand="UDP-alpha-D-glucuronate"
FT                   /ligand_id="ChEBI:CHEBI:58052"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01166"
FT   BINDING         613
FT                   /ligand="UDP-alpha-D-glucuronate"
FT                   /ligand_id="ChEBI:CHEBI:58052"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01166"
FT   SITE            102
FT                   /note="Transition state stabilizer"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01166"
FT   SITE            140
FT                   /note="Raises pKa of active site His"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01166"
SQ   SEQUENCE   660 AA;  73373 MW;  D402B5204675919D CRC64;
     MKAVVFAYHD IGCAGINALV AAGYDITAIY THPDAPSENH FFGSVARTAA EHGIPVYAPN
     DVNHPLWIDR IKSAQPDVIF SFYYRNLLCD EILNSATVGA FNLHGSLLPH YRGRAPLNWV
     LVKGETETGV TLHKMVSRAD AGAIVAQHRV AIAPEETALT LHHKLTQASS DLLKDILPVI
     KTGHFPEVEQ DHSQASIFGR RTAQDGCIDW HATAQEISNL VRAVTDPWPG AFGYVGGSKF
     IVWKARALEG LQAAKAGTVL SVSPLVIATG GGALEIMTGQ TENGVYMQGS QLAQTLGLVA
     GAIISSQPVS AIKRRTRVLI LGVNGFIGNH LTERLLQDDN FEVYGLDIGS DAISRFIGNS
     RFHFVEGDIS IHSEWIEYHI KKCDVVLPLV AIATPIEYTR NPLRVFELDF EENLKIIRDC
     VKYQKRIIFP STSEVYGMCS DKVFDEDHSN LIVGPINKQR WIYSVSKQLL DRVIWAYGEK
     EGLRFTLFRP FNWMGPRLDN LNAARIGSSR AITQLILNLV EGSPIKLIDG GRQKRCFTDI
     SDGIEALFRI IENKNSNCDG QIINIGNPDN EASIKELAEM LLASFEKHPL RNHFPPFAGF
     REVESSTYYG KGYQDVEHRK PSIRNAHRLI SWTPTVEMEK TIDETLDFFL KTVELTEPQA
 
 
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