ID MURQ_NOSP7 Reviewed; 308 AA.
AC B2IU18;
DT 24-MAR-2009, integrated into UniProtKB/Swiss-Prot.
DT 10-JUN-2008, sequence version 1.
DT 27-MAR-2024, entry version 81.
DE RecName: Full=N-acetylmuramic acid 6-phosphate etherase {ECO:0000255|HAMAP-Rule:MF_00068};
DE Short=MurNAc-6-P etherase {ECO:0000255|HAMAP-Rule:MF_00068};
DE EC=4.2.1.126 {ECO:0000255|HAMAP-Rule:MF_00068};
DE AltName: Full=N-acetylmuramic acid 6-phosphate hydrolase {ECO:0000255|HAMAP-Rule:MF_00068};
DE AltName: Full=N-acetylmuramic acid 6-phosphate lyase {ECO:0000255|HAMAP-Rule:MF_00068};
GN Name=murQ {ECO:0000255|HAMAP-Rule:MF_00068}; OrderedLocusNames=Npun_R6016;
OS Nostoc punctiforme (strain ATCC 29133 / PCC 73102).
OC Bacteria; Cyanobacteriota; Cyanophyceae; Nostocales; Nostocaceae; Nostoc.
OX NCBI_TaxID=63737;
RN [1]
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=ATCC 29133 / PCC 73102;
RX PubMed=23463784; DOI=10.1104/pp.112.213116;
RA Ekman M., Picossi S., Campbell E.L., Meeks J.C., Flores E.;
RT "A Nostoc punctiforme Sugar Transporter Necessary to Establish a
RT Cyanobacterium-Plant Symbiosis.";
RL Plant Physiol. 161:1984-1992(2013).
CC -!- FUNCTION: Specifically catalyzes the cleavage of the D-lactyl ether
CC substituent of MurNAc 6-phosphate, producing GlcNAc 6-phosphate and D-
CC lactate. {ECO:0000255|HAMAP-Rule:MF_00068}.
CC -!- CATALYTIC ACTIVITY:
CC Reaction=H2O + N-acetyl-D-muramate 6-phosphate = (R)-lactate + N-
CC acetyl-D-glucosamine 6-phosphate; Xref=Rhea:RHEA:26410,
CC ChEBI:CHEBI:15377, ChEBI:CHEBI:16004, ChEBI:CHEBI:57513,
CC ChEBI:CHEBI:58722; EC=4.2.1.126; Evidence={ECO:0000255|HAMAP-
CC Rule:MF_00068};
CC -!- PATHWAY: Amino-sugar metabolism; N-acetylmuramate degradation.
CC {ECO:0000255|HAMAP-Rule:MF_00068}.
CC -!- SUBUNIT: Homodimer. {ECO:0000255|HAMAP-Rule:MF_00068}.
CC -!- MISCELLANEOUS: A lyase-type mechanism (elimination/hydration) is
CC suggested for the cleavage of the lactyl ether bond of MurNAc 6-
CC phosphate, with the formation of an alpha,beta-unsaturated aldehyde
CC intermediate with (E)-stereochemistry, followed by the syn addition of
CC water to give product. {ECO:0000255|HAMAP-Rule:MF_00068}.
CC -!- SIMILARITY: Belongs to the GCKR-like family. MurNAc-6-P etherase
CC subfamily. {ECO:0000255|HAMAP-Rule:MF_00068}.
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DR EMBL; CP001037; ACC84306.1; -; Genomic_DNA.
DR RefSeq; WP_012412247.1; NC_010628.1.
DR AlphaFoldDB; B2IU18; -.
DR SMR; B2IU18; -.
DR STRING; 63737.Npun_R6016; -.
DR EnsemblBacteria; ACC84306; ACC84306; Npun_R6016.
DR KEGG; npu:Npun_R6016; -.
DR eggNOG; COG2103; Bacteria.
DR HOGENOM; CLU_049049_1_1_3; -.
DR OrthoDB; 9813395at2; -.
DR PhylomeDB; B2IU18; -.
DR UniPathway; UPA00342; -.
DR Proteomes; UP000001191; Chromosome.
DR GO; GO:0097367; F:carbohydrate derivative binding; IEA:InterPro.
DR GO; GO:0016835; F:carbon-oxygen lyase activity; IEA:UniProtKB-UniRule.
DR GO; GO:0046348; P:amino sugar catabolic process; IEA:InterPro.
DR GO; GO:0005975; P:carbohydrate metabolic process; IEA:UniProtKB-KW.
DR GO; GO:0097173; P:N-acetylmuramic acid catabolic process; IEA:UniProtKB-UniPathway.
DR CDD; cd05007; SIS_Etherase; 1.
DR Gene3D; 1.10.8.1080; -; 1.
DR HAMAP; MF_00068; MurQ; 1.
DR InterPro; IPR005488; Etherase_MurQ.
DR InterPro; IPR005486; Glucokinase_regulatory_CS.
DR InterPro; IPR040190; MURQ/GCKR.
DR InterPro; IPR001347; SIS_dom.
DR InterPro; IPR046348; SIS_dom_sf.
DR NCBIfam; TIGR00274; N-acetylmuramic acid 6-phosphate etherase; 1.
DR PANTHER; PTHR10088; GLUCOKINASE REGULATORY PROTEIN; 1.
DR PANTHER; PTHR10088:SF4; GLUCOKINASE REGULATORY PROTEIN; 1.
DR Pfam; PF20741; GKRP-like_C; 1.
DR Pfam; PF01380; SIS; 1.
DR SUPFAM; SSF53697; SIS domain; 1.
DR PROSITE; PS01272; GCKR; 1.
DR PROSITE; PS51464; SIS; 1.
PE 3: Inferred from homology;
KW Carbohydrate metabolism; Lyase; Reference proteome.
FT CHAIN 1..308
FT /note="N-acetylmuramic acid 6-phosphate etherase"
FT /id="PRO_1000092309"
FT DOMAIN 59..222
FT /note="SIS"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00068"
FT ACT_SITE 87
FT /note="Proton donor"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00068"
FT ACT_SITE 118
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00068"
SQ SEQUENCE 308 AA; 32848 MW; F6D6A7ABD82EA060 CRC64;
MTNLQERGHL LTELVNPNSL NLDQLSSLEL VELFNSEDQK AVAAVAAAKV QLAEAIDSTA
ERLRHGGRLF YIGAGTSGRL GVLDAAECPP TFCTPPELVQ GIIAGGAGAL VRSSEDLEDS
IEDGEAAIAG RHITQLDVVV GITAGGTTPY VHGAIHAARQ RGASTIFIAC VPAEQVSIDA
DIDIRLLTGP EIIAGSTRLK AGTVTKLALN MLSTGVMVKL GKVYGNRMVD VAVTNQKLRD
RALRILQDLT GLSREAAGFL LERSGKWVKL ALLMHWTGLE KDDGDRLLSE HQSNLRAAVM
SYQNHNQS
//
