Identification
Name:Maltose/maltodextrin import ATP-binding protein MalK
Synonyms:Not Available
Gene Name:malK
Enzyme Class:
Biological Properties
General Function:Involved in nucleotide binding
Specific Function:Part of the ABC transporter complex MalEFGK involved in maltose/maltodextrin import. Responsible for energy coupling to the transport system
Cellular Location:Cell inner membrane; Peripheral membrane protein
SMPDB Pathways:
KEGG Pathways:
SMPDB Reactions:
1.0Thumb+1.0Thumb+1.0Thumb1.0Thumb+1.0Thumb+1.0Thumb+1.0Adenosine diphosphate+1.0Thumb
1.0Maltotetraose + 1.0Adenosine triphosphate + 1.0Water → 1.0Maltotetraose + 1.0Phosphate + 1.0Hydrogen ion + 1.0Adenosine diphosphate + 1.0ADP
ReactionCard
1.0Thumb+1.0Thumb+1.0Thumb1.0Adenosine diphosphate+1.0Thumb+1.0Thumb+1.0Thumb+1.0Thumb
1.0Maltotriose + 1.0Adenosine triphosphate + 1.0Water → 1.0Adenosine diphosphate + 1.0Phosphate + 1.0Hydrogen ion + 1.0Maltotriose + 1.0ADP
ReactionCard
1.0Thumb+1.0Thumb+1.0Thumb1.0Thumb+1.0Thumb+1.0Thumb+1.0Adenosine diphosphate+1.0Thumb
1.0D-Maltose + 1.0Adenosine triphosphate + 1.0Water → 1.0D-Maltose + 1.0Phosphate + 1.0Hydrogen ion + 1.0Adenosine diphosphate + 1.0ADP
ReactionCard
EcoCyc Reactions:
1.0Thumb+1.0Thumb+1.0Thumb1.0Thumb+1.0Thumb+1.0Thumb+1.0Thumb
1.0Thumb+1.0Thumb+1.0Thumb1.0Thumb+1.0Thumb+1.0Thumb+1.0Thumb
1.0Thumb+1.0Thumb+1.0Thumb1.0Thumb+1.0Thumb+1.0Thumb+1.0Thumb
Complex Reactions:
1.0Thumb+1.0Thumb+1.0Thumb1.0Thumb+1.0Thumb+1.0Thumb+1.0Thumb
1.0Thumb+1.0Thumb+1.0Thumb1.0Thumb+1.0Thumb+1.0Thumb+1.0Thumb
1.0Thumb+1.0Thumb+1.0Thumb1.0Thumb+1.0Thumb+1.0Thumb+1.0Thumb
1.0Thumb+1.0Thumb+1.0Thumb1.0Thumb+1.0Thumb+1.0Thumb
Metabolites:
ECMDB IDNameView
ECMDB211101,4-alpha-D-glucanMetaboCard
ECMDB00538Adenosine triphosphateMetaboCard
ECMDB01341ADPMetaboCard
ECMDB00163D-MaltoseMetaboCard
ECMDB21225Hydrogen ionMetaboCard
ECMDB21380Inorganic phosphateMetaboCard
ECMDB21243MaltohexaoseMetaboCard
ECMDB21244MaltopentaoseMetaboCard
ECMDB01296MaltotetraoseMetaboCard
ECMDB01262MaltotrioseMetaboCard
ECMDB01429PhosphateMetaboCard
ECMDB00494WaterMetaboCard
GO Classification:
Component
ATP-binding cassette (ABC) transporter complex
cell part
macromolecular complex
membrane
protein complex
Function
adenyl nucleotide binding
adenyl ribonucleotide binding
alpha-glucoside transmembrane transporter activity
ATP binding
ATPase activity
binding
carbohydrate transmembrane transporter activity
catalytic activity
glucoside transmembrane transporter activity
hydrolase activity
hydrolase activity, acting on acid anhydrides
hydrolase activity, acting on acid anhydrides, catalyzing transmembrane movement of substances
hydrolase activity, acting on acid anhydrides, in phosphorus-containing anhydrides
maltose transmembrane transporter activity
maltose-transporting ATPase activity
nucleoside binding
nucleoside-triphosphatase activity
nucleotide binding
purine nucleoside binding
pyrophosphatase activity
substrate-specific transmembrane transporter activity
sugar transmembrane transporter activity
transmembrane transporter activity
transporter activity
Process
alpha-glucoside transport
carbohydrate transport
establishment of localization
glucoside transport
maltose transport
transport
Gene Properties
Blattner:b4035
Gene OrientationClockwise
Centisome Percentage:91.49
Left Sequence End4244807
Right Sequence End4245922
Gene Sequence:
>1116 bp
ATGTTCCCAAAAATAATGAATGATGAAAACTTTTTCAAAAAAGCGGCGGCGCACGGGGAG
GAACCTCCTTTAACTCCTCAAAACGAACATCAGCGGTCCGGGCTGCGCTTCGCCCGTCGC
GTCAGACTACCCCGTGCGGTTGGCCTGGCTGGCATGTTCTTACCGATTGCTTCAACGCTG
GTTTCACACCCGCCGCCGGGCTGGTGGTGGCTGGTGTTGGTCGGCTGGGCGTTCGTCTGG
CCGCATTTAGCCTGGCAGATAGCGAGCAGGGCCGTCGATCCGCTTAGCCGGGAAATTTAC
AACTTAAAAACCGATGCAGTATTAGCGGGAATGTGGGTAGGCGTAATGGGCGTAAACGTG
CTGCCTTCCACCGCGATGTTGATGATTATGTGTCTGAATTTGATGGGGGCAGGCGGCCCC
CGTCTGTTTGTCGCGGGTCTGGTGTTGATGGTGGTTTCCTGCCTTGTCACCCTCGAGCTG
ACGGGCATTACCGTGTCGTTCAATAGTGCGCCGCTGGAATGGTGGCTCTCCCTTCCCATT
ATTGTCATTTATCCTCTGCTGTTTGGCTGGGTCAGCTACCAGACGGCAACCAAACTGGCG
GAACATAAACGCAGGTTGCAGGTCATGAGTACCCGCGACGGCATGACGGGCGTGTATAAC
CGACGTCATTGGGAAACTATGTTACGCAATGAATTTGATAACTGTCGGCGGCATAATCGC
GATGCAACGTTACTGATTATCGATATCGACCATTTCAAGAGCATCAACGATACCTGGGGC
CATGATGTGGGCGATGAAGCGATTGTGGCGCTTACCCGACAGTTACAAATTACCCTGCGC
GGTAGCGATGTGATTGGTCGGTTTGGCGGCGATGAGTTTGCAGTAATCATGTCCGGTACG
CCAGCTGAGAGCGCCATTACCGCCATGTTACGGGTGCATGAAGGGCTAAATACATTACGT
TTGCCGAATACGCCACAGGTAACTTTACGGATTAGTGTGGGGGTTGCGCCGCTGAACCCA
CAAATGAGTCACTATCGTGAGTGGTTGAAATCGGCAGATTTGGCGCTTTACAAAGCAAAG
AAAGCCGGACGTAACCGCACCGAAGTGGCGGCCTGA
Protein Properties
Pfam Domain Function:
Protein Residues:371
Protein Molecular Weight:40990
Protein Theoretical pI:7
PDB File:1Q1E
Signaling Regions:
  • None
Transmembrane Regions:
  • None
Protein Sequence:
>Maltose/maltodextrin import ATP-binding protein MalK
MASVQLQNVTKAWGEVVVSKDINLDIHEGEFVVFVGPSGCGKSTLLRMIAGLETITSGDL
FIGEKRMNDTPPAERGVGMVFQSYALYPHLSVAENMSFGLKLAGAKKEVINQRVNQVAEV
LQLAHLLDRKPKALSGGQRQRVAIGRTLVAEPSVFLLDEPLSNLDAALRVQMRIEISRLH
KRLGRTMIYVTHDQVEAMTLADKIVVLDAGRVAQVGKPLELYHYPADRFVAGFIGSPKMN
FLPVKVTATAIDQVQVELPMPNRQQVWLPVESRDVQVGANMSLGIRPEHLLPSDIADVIL
EGEVQVVEQLGNETQIHIQIPSIRQNLVYRQNDVVLVEEGATFAIGLPPERCHLFREDGT
ACRRLHKEPGV
References
External Links:
ResourceLink
Uniprot ID:P68187
Uniprot Name:MALK_ECOLI
GenBank Gene ID:AP009048
Genebank Protein ID:85674526
PDB ID:1Q1E
Ecogene ID:EG10558
Ecocyc:EG10558
ColiBase:b4035
Kegg Gene:b4035
EchoBASE ID:EB0553
CCDB:MALK_ECOLI
BacMap:16131861
General Reference:
  • Bedouelle, H., Hofnung, M. (1982). "A DNA sequence containing the control regions of the malEFG and malK-lamB operons in Escherichia coli K12." Mol Gen Genet 185:82-87. Pubmed: 6283312
  • Blattner, F. R., Burland, V., Plunkett, G. 3rd, Sofia, H. J., Daniels, D. L. (1993). "Analysis of the Escherichia coli genome. IV. DNA sequence of the region from 89.2 to 92.8 minutes." Nucleic Acids Res 21:5408-5417. Pubmed: 8265357
  • Blattner, F. R., Plunkett, G. 3rd, Bloch, C. A., Perna, N. T., Burland, V., Riley, M., Collado-Vides, J., Glasner, J. D., Rode, C. K., Mayhew, G. F., Gregor, J., Davis, N. W., Kirkpatrick, H. A., Goeden, M. A., Rose, D. J., Mau, B., Shao, Y. (1997). "The complete genome sequence of Escherichia coli K-12." Science 277:1453-1462. Pubmed: 9278503
  • Bohm, A., Diez, J., Diederichs, K., Welte, W., Boos, W. (2002). "Structural model of MalK, the ABC subunit of the maltose transporter of Escherichia coli: implications for mal gene regulation, inducer exclusion, and subunit assembly." J Biol Chem 277:3708-3717. Pubmed: 11709552
  • Boos, W., Shuman, H. (1998). "Maltose/maltodextrin system of Escherichia coli: transport, metabolism, and regulation." Microbiol Mol Biol Rev 62:204-229. Pubmed: 9529892
  • Chen, J., Lu, G., Lin, J., Davidson, A. L., Quiocho, F. A. (2003). "A tweezers-like motion of the ATP-binding cassette dimer in an ABC transport cycle." Mol Cell 12:651-661. Pubmed: 14527411
  • Dahl, M. K., Francoz, E., Saurin, W., Boos, W., Manson, M. D., Hofnung, M. (1989). "Comparison of sequences from the malB regions of Salmonella typhimurium and Enterobacter aerogenes with Escherichia coli K12: a potential new regulatory site in the interoperonic region." Mol Gen Genet 218:199-207. Pubmed: 2674653
  • Davidson, A. L., Nikaido, H. (1990). "Overproduction, solubilization, and reconstitution of the maltose transport system from Escherichia coli." J Biol Chem 265:4254-4260. Pubmed: 2155217
  • Davidson, A. L., Nikaido, H. (1991). "Purification and characterization of the membrane-associated components of the maltose transport system from Escherichia coli." J Biol Chem 266:8946-8951. Pubmed: 2026607
  • Dean, D. A., Reizer, J., Nikaido, H., Saier, M. H. Jr (1990). "Regulation of the maltose transport system of Escherichia coli by the glucose-specific enzyme III of the phosphoenolpyruvate-sugar phosphotransferase system. Characterization of inducer exclusion-resistant mutants and reconstitution of inducer exclusion in proteoliposomes." J Biol Chem 265:21005-21010. Pubmed: 2250006
  • Gilson, E., Nikaido, H., Hofnung, M. (1982). "Sequence of the malK gene in E.coli K12." Nucleic Acids Res 10:7449-7458. Pubmed: 6296778
  • Hayashi, K., Morooka, N., Yamamoto, Y., Fujita, K., Isono, K., Choi, S., Ohtsubo, E., Baba, T., Wanner, B. L., Mori, H., Horiuchi, T. (2006). "Highly accurate genome sequences of Escherichia coli K-12 strains MG1655 and W3110." Mol Syst Biol 2:2006.0007. Pubmed: 16738553
  • Hunke, S., Mourez, M., Jehanno, M., Dassa, E., Schneider, E. (2000). "ATP modulates subunit-subunit interactions in an ATP-binding cassette transporter (MalFGK2) determined by site-directed chemical cross-linking." J Biol Chem 275:15526-15534. Pubmed: 10809785
  • Kuhnau, S., Reyes, M., Sievertsen, A., Shuman, H. A., Boos, W. (1991). "The activities of the Escherichia coli MalK protein in maltose transport, regulation, and inducer exclusion can be separated by mutations." J Bacteriol 173:2180-2186. Pubmed: 2007546
  • Mourez, M., Hofnung, M., Dassa, E. (1997). "Subunit interactions in ABC transporters: a conserved sequence in hydrophobic membrane proteins of periplasmic permeases defines an important site of interaction with the ATPase subunits." EMBO J 16:3066-3077. Pubmed: 9214624
  • Panagiotidis, C. H., Boos, W., Shuman, H. A. (1998). "The ATP-binding cassette subunit of the maltose transporter MalK antagonizes MalT, the activator of the Escherichia coli mal regulon." Mol Microbiol 30:535-546. Pubmed: 9822819
  • Stenberg, F., Chovanec, P., Maslen, S. L., Robinson, C. V., Ilag, L. L., von Heijne, G., Daley, D. O. (2005). "Protein complexes of the Escherichia coli cell envelope." J Biol Chem 280:34409-34419. Pubmed: 16079137