Gene name |
Blattner ID |
Description |
EcoCyc link |
SwissProt comment |
| lacI | b0345 | transcriptional repressor of the lac operon |
EG10525 |
FUNCTION: REPRESSOR OF THE LACTOSE OPERON. BINDS LACTOSE AS AN
INDUCER.
SUBUNIT: HOMOTETRAMER.
MISCELLANEOUS: REMOVAL OF RESIDUES 1-59 AND 328-347 RESULTS IN THE
MOLECULE LOSING ITS DNA-BINDING ACTIVITY WHILE MAINTAINING ITS
INDUCER-BINDING ACTIVITY AND ITS TETRAMERIC STRUCTURE.
SIMILARITY: BELONGS TO THE LACI FAMILY OF TRANSCRIPTIONAL
REGULATORS.
|
| lacZ | b0344 | beta-D-galactosidase |
EG10527 |
CATALYTIC ACTIVITY: HYDROLYSIS OF TERMINAL, NON-REDUCING BETA-D-
GALACTOSE RESIDUES IN BETA-D-GALACTOSIDES.
SUBUNIT: HOMOTETRAMER.
SIMILARITY: BELONGS TO FAMILY 2 OF GLYCOSYL HYDROLASES.
DATABASE: NAME=Worthington enzyme manual;
WWW="http://www.worthington-biochem.com/manual/G/BG.html".
DATABASE: NAME=ProZyme technical fact sheet;
WWW="http://www.prozyme.com/technical/bgaldata.html".
|
| lacY | b0343 | galactoside permease (M protein) |
EG10526 |
FUNCTION: RESPONSIBLE FOR TRANSPORT OF BETA-GALACTOSIDES INTO THE
CELL, WITH THE CONCOMITANT IMPORT OF A PROTON (SYMPORT SYSTEM).
SUBUNIT: MONOMER.
SUBCELLULAR LOCATION: INTEGRAL MEMBRANE PROTEIN. INNER MEMBRANE.
MASS SPECTROMETRY: MW=47357; METHOD=ELECTROSPRAY.
SIMILARITY: BELONGS TO THE LACY/RAFB FAMILY OF PERMEASES.
|
| lacA | b0342 | thiogalactoside acetyltransferase |
EG10524 |
CATALYTIC ACTIVITY: ACETYL-COA + A BETA-D-GALACTOSIDE = COA +
A 6-ACETYL-BETA-D-GALACTOSIDE.
PATHWAY: BIOSYNTHESIS OF LACTOSE.
SUBUNIT: HOMODIMER.
SUBCELLULAR LOCATION: CYTOPLASMIC.
PTM: THE AMINO TERMINUS OF THIS PROTEIN IS HETEROGENOUS BECAUSE
THE INITIATOR METHIONINE IS ONLY PARTIALLY CLEAVED.
SIMILARITY: BELONGS TO THE CYSE/LACA/LPXA/NODL FAMILY OF
ACETYLTRANSFERASES. COMPOSED OF MULTIPLE REPEATS OF [LIV]-G-X(4).
|