ID MURQ_SYNY3 Reviewed; 305 AA.
AC P73585;
DT 01-NOV-1997, integrated into UniProtKB/Swiss-Prot.
DT 01-FEB-1997, sequence version 1.
DT 27-MAR-2024, entry version 136.
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=sll0861;
OS Synechocystis sp. (strain PCC 6803 / Kazusa).
OC Bacteria; Cyanobacteriota; Cyanophyceae; Synechococcales; Merismopediaceae;
OC Synechocystis.
OX NCBI_TaxID=1111708;
RN [1]
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=PCC 6803 / Kazusa;
RX PubMed=8905231; DOI=10.1093/dnares/3.3.109;
RA Kaneko T., Sato S., Kotani H., Tanaka A., Asamizu E., Nakamura Y.,
RA Miyajima N., Hirosawa M., Sugiura M., Sasamoto S., Kimura T., Hosouchi T.,
RA Matsuno A., Muraki A., Nakazaki N., Naruo K., Okumura S., Shimpo S.,
RA Takeuchi C., Wada T., Watanabe A., Yamada M., Yasuda M., Tabata S.;
RT "Sequence analysis of the genome of the unicellular cyanobacterium
RT Synechocystis sp. strain PCC6803. II. Sequence determination of the entire
RT genome and assignment of potential protein-coding regions.";
RL DNA Res. 3:109-136(1996).
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; BA000022; BAA17625.1; -; Genomic_DNA.
DR PIR; S77291; S77291.
DR AlphaFoldDB; P73585; -.
DR SMR; P73585; -.
DR IntAct; P73585; 28.
DR STRING; 1148.gene:10498492; -.
DR PaxDb; 1148-1652705; -.
DR EnsemblBacteria; BAA17625; BAA17625; BAA17625.
DR KEGG; syn:sll0861; -.
DR eggNOG; COG2103; Bacteria.
DR InParanoid; P73585; -.
DR PhylomeDB; P73585; -.
DR UniPathway; UPA00342; -.
DR Proteomes; UP000001425; Chromosome.
DR GO; GO:0097367; F:carbohydrate derivative binding; IEA:InterPro.
DR GO; GO:0016835; F:carbon-oxygen lyase activity; IBA:GO_Central.
DR GO; GO:0016803; F:ether hydrolase activity; IBA:GO_Central.
DR GO; GO:0046348; P:amino sugar catabolic process; IBA:GO_Central.
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 GO; GO:0009254; P:peptidoglycan turnover; IBA:GO_Central.
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..305
FT /note="N-acetylmuramic acid 6-phosphate etherase"
FT /id="PRO_0000214839"
FT DOMAIN 61..224
FT /note="SIS"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00068"
FT ACT_SITE 89
FT /note="Proton donor"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00068"
FT ACT_SITE 120
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00068"
SQ SEQUENCE 305 AA; 32181 MW; 1B223275DE714D18 CRC64;
MPMEILEERG HLLTEQTNPQ SQNLDQLSSL ELVDLFNQQD QLTVTAIAGA REDLAAAIEI
ISDALAKGGR LFYIGAGTSG RLGVLDAVEC PPTFCTPSEL VQGILAGGAS ALLRSSEGLE
DIAADGAQAI ADHRITQLDV VVGITAGGTT PYVHGALDAA RARGTKTIFI ACVPESQAPC
QADVNIRLLT GPEILAGSTR LKAGTVTKMA LNILSTGAMV KLGKVYGNRM VDVAVTNRKL
EDRAIRILRD LTDLNREEAA ELLVASGQRV KLALLMHWSG LSAESAQAQL DRHGGNLRQA
MDAAP
//
