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(-) Description

Title :  MALTOPORIN MALTOSE COMPLEX
 
Authors :  R. Dutzler, T. Schirmer
Date :  11 Jan 96  (Deposition) - 12 Mar 97  (Release) - 15 Mar 17  (Revision)
Method :  X-RAY DIFFRACTION
Resolution :  2.60
Chains :  Asym./Biol. Unit :  A,B,C
Keywords :  Membrane Protein, Sugar Transport, Specific Porin, Beta Barrel (Keyword Search: [Gene Ontology, PubMed, Web (Google))
 
Reference :  R. Dutzler, Y. F. Wang, P. J. Rizkallah, J. P. Rosenbusch, T. Schirmer
Crystal Structures Of Various Maltooligosaccharides Bound T Maltoporin Reveal A Specific Sugar Translocation Pathway.
Structure V. 4 127 1996
PubMed-ID: 8805519  |  Reference-DOI: 10.1016/S0969-2126(96)00016-0
(for further references see the PDB file header)

(-) Compounds

Molecule 1 - MALTOPORIN
    ChainsA, B, C
    Organism ScientificESCHERICHIA COLI
    Organism Taxid562
    SynonymLAMB

 Structural Features

(-) Chains, Units

  123
Asymmetric/Biological Unit ABC

Summary Information (see also Sequences/Alignments below)

(-) Ligands, Modified Residues, Ions  (3, 15)

Asymmetric/Biological Unit (3, 15)
No.NameCountTypeFull Name
1BGC6Ligand/IonBETA-D-GLUCOSE
2GLC6Ligand/IonALPHA-D-GLUCOSE
3MG3Ligand/IonMAGNESIUM ION

(-) Sites  (15, 15)

Asymmetric Unit (15, 15)
No.NameEvidenceResiduesDescription
01AC1SOFTWARETYR A:6 , ARG A:33 , ASP A:111 , HIS A:113 , TRP A:420 , BGC A:432 , HOH A:513BINDING SITE FOR RESIDUE GLC A 431
02AC2SOFTWARETYR A:6 , ARG A:8 , ARG A:33 , TYR A:41 , GLU A:43 , PHE A:106 , ARG A:109 , ASP A:116 , TYR A:118 , GLC A:431 , GLC A:441BINDING SITE FOR RESIDUE BGC A 432
03AC3SOFTWAREARG A:8 , TYR A:41 , ARG A:82 , ASP A:116 , TYR A:118 , BGC A:432 , BGC A:442BINDING SITE FOR RESIDUE GLC A 441
04AC4SOFTWAREGLC A:441BINDING SITE FOR RESIDUE BGC A 442
05AC5SOFTWAREASP A:78 , MG A:422 , MG A:423 , ASP B:78 , ASP C:78BINDING SITE FOR RESIDUE MG B 422
06AC6SOFTWARETYR B:6 , ARG B:33 , ASP B:111 , HIS B:113 , TRP B:420 , BGC B:432 , HOH B:520BINDING SITE FOR RESIDUE GLC B 431
07AC7SOFTWARETYR B:6 , ARG B:8 , ARG B:33 , TYR B:41 , GLU B:43 , PHE B:106 , ARG B:109 , ASP B:116 , TYR B:118 , GLC B:431 , GLC B:441BINDING SITE FOR RESIDUE BGC B 432
08AC8SOFTWAREARG B:8 , TYR B:41 , ARG B:82 , ASP B:116 , TYR B:118 , BGC B:432 , BGC B:442BINDING SITE FOR RESIDUE GLC B 441
09AC9SOFTWAREGLC B:441BINDING SITE FOR RESIDUE BGC B 442
10BC1SOFTWAREASP A:78 , MG A:423 , ASP B:78 , MG B:422 , ASP C:78BINDING SITE FOR RESIDUE MG A 422
11BC2SOFTWARETYR C:6 , ARG C:33 , ASP C:111 , HIS C:113 , TRP C:420 , BGC C:432 , HOH C:521BINDING SITE FOR RESIDUE GLC C 431
12BC3SOFTWARETYR C:6 , ARG C:8 , ARG C:33 , TYR C:41 , GLU C:43 , PHE C:106 , ARG C:109 , ASP C:116 , TYR C:118 , GLC C:431 , GLC C:441BINDING SITE FOR RESIDUE BGC C 432
13BC4SOFTWAREARG C:8 , TYR C:41 , ARG C:82 , ASP C:116 , TYR C:118 , BGC C:432 , BGC C:442BINDING SITE FOR RESIDUE GLC C 441
14BC5SOFTWAREGLC C:441BINDING SITE FOR RESIDUE BGC C 442
15BC6SOFTWAREASP A:78 , MG A:422 , ASP B:78 , MG B:422 , ASP C:78BINDING SITE FOR RESIDUE MG A 423

(-) SS Bonds  (3, 3)

Asymmetric/Biological Unit
No.Residues
1A:22 -A:38
2B:22 -B:38
3C:22 -C:38

(-) Cis Peptide Bonds  (3, 3)

Asymmetric/Biological Unit
No.Residues
1Arg A:360 -Pro A:361
2Arg B:360 -Pro B:361
3Arg C:360 -Pro C:361

 Sequence-Structure Mapping

(-) SAPs(SNPs)/Variants  (0, 0)

(no "SAP(SNP)/Variant" information available for 1MPM)

(-) PROSITE Motifs  (0, 0)

(no "PROSITE Motif" information available for 1MPM)

(-) Exons   (0, 0)

(no "Exon" information available for 1MPM)

(-) Sequences/Alignments

Asymmetric/Biological Unit
   Reformat: Number of residues per line =  ('0' or empty: single-line sequence representation)
  Number of residues per labelling interval =   
  UniProt sequence: complete  aligned part    
   Show mapping: SCOP domains CATH domains Pfam domains Secondary structure (by author)
SAPs(SNPs) PROSITE motifs Exons
(details for a mapped element are shown in a popup box when the mouse pointer rests over it)
Chain A from PDB  Type:PROTEIN  Length:421
 aligned with LAMB_ECOLI | P02943 from UniProtKB/Swiss-Prot  Length:446

    Alignment length:421
                                    35        45        55        65        75        85        95       105       115       125       135       145       155       165       175       185       195       205       215       225       235       245       255       265       275       285       295       305       315       325       335       345       355       365       375       385       395       405       415       425       435       445 
           LAMB_ECOLI    26 VDFHGYARSGIGWTGSGGEQQCFQTTGAQSKYRLGNECETYAELKLGQEVWKEGDKSFYFDTNVAYSVAQQNDWEATDPAFREANVQGKNLIEWLPGSTIWAGKRFYQRHDVHMIDFYYWDISGPGAGLENIDVGFGKLSLAATRSSEAGGSSSFASNNIYDYTNETANDVFDVRLAQMEINPGGTLELGVDYGRANLRDNYRLVDGASKDGWLFTAEHTQSVLKGFNKFVVQYATDSMTSQGKGLSQGSGVAFDNEKFAYNINNNGHMLRILDHGAISMGDNWDMMYVGMYQDINWDNDNGTKWWTVGIRPMYKWTPIMSTVMEIGYDNVESQRTGDKNNQYKITLAQQWQAGDSIWSRPAIRVFATYAKWDEKWGYDYTGNADNNANFGKAVPADFNGGSFGRGDSDEWTFGAQMEIWW 446
               SCOP domains d1mpma_ A: Maltoporin (also LamB protein)                                                                                                                                                                                                                                                                                                                                                                                             SCOP domains
               CATH domains 1mpmA00 A:1-421  [code=2.40.170.10, no name defined]                                                                                                                                                                                                                                                                                                                                                                                  CATH domains
               Pfam domains ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author .eeeeeeeeeeeee.........................eeeeeeeeeeeeee..eeeeeeeeeeeee...........eeeeeeeeee...hhh...eeeeeee....eeehhh.eeee...eeeeeee.......eeeeeeeeeeeeeee.......hhh..eeeeeeeeeeeee.......eeeeeeeeeeee..............eeeeeeeeeeeee..eeeeeeeeeeehhh............eee.....eee....eeeeeeeeeeeee....eeeeeeeeeeeeee.....eeeeeeeeeeeee....eeeeeeeeeeeeee.....eeeeeeeeeeeeee.........eeeeeeeeeeeee.eee..............eee..hhh......eeeeeeeeeeeeeee Sec.struct. author
                 SAPs(SNPs) ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- SAPs(SNPs)
                    PROSITE ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- PROSITE
                 Transcript ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Transcript
                 1mpm A   1 VDFHGYARSGIGWTGSGGEQQCFQTTGAQSKYRLGNECETYAELKLGQEVWKEGDKSFYFDTNVAYSVAQQNDWEATDPAFREANVQGKNLIEWLPGSTIWAGKRFYQRHDVHMIDFYYWDISGPGAGLENIDVGFGKLSLAATRSSEAGGSSSFASNNIYDYTNETANDVFDVRLAQMEINPGGTLELGVDYGRANLRDNYRLVDGASKDGWLFTAEHTQSVLKGFNKFVVQYATDSMTSQGKGLSQGSGVAFDNEKFAYNINNNGHMLRILDHGAISMGDNWDMMYVGMYQDINWDNDNGTKWWTVGIRPMYKWTPIMSTVMEIGYDNVESQRTGDKNNQYKITLAQQWQAGDSIWSRPAIRVFATYAKWDEKWGYDYTGNADNNANFGKAVPADFNGGSFGRGDSDEWTFGAQMEIWW 421
                                    10        20        30        40        50        60        70        80        90       100       110       120       130       140       150       160       170       180       190       200       210       220       230       240       250       260       270       280       290       300       310       320       330       340       350       360       370       380       390       400       410       420 

Chain B from PDB  Type:PROTEIN  Length:421
 aligned with LAMB_ECOLI | P02943 from UniProtKB/Swiss-Prot  Length:446

    Alignment length:421
                                    35        45        55        65        75        85        95       105       115       125       135       145       155       165       175       185       195       205       215       225       235       245       255       265       275       285       295       305       315       325       335       345       355       365       375       385       395       405       415       425       435       445 
           LAMB_ECOLI    26 VDFHGYARSGIGWTGSGGEQQCFQTTGAQSKYRLGNECETYAELKLGQEVWKEGDKSFYFDTNVAYSVAQQNDWEATDPAFREANVQGKNLIEWLPGSTIWAGKRFYQRHDVHMIDFYYWDISGPGAGLENIDVGFGKLSLAATRSSEAGGSSSFASNNIYDYTNETANDVFDVRLAQMEINPGGTLELGVDYGRANLRDNYRLVDGASKDGWLFTAEHTQSVLKGFNKFVVQYATDSMTSQGKGLSQGSGVAFDNEKFAYNINNNGHMLRILDHGAISMGDNWDMMYVGMYQDINWDNDNGTKWWTVGIRPMYKWTPIMSTVMEIGYDNVESQRTGDKNNQYKITLAQQWQAGDSIWSRPAIRVFATYAKWDEKWGYDYTGNADNNANFGKAVPADFNGGSFGRGDSDEWTFGAQMEIWW 446
               SCOP domains d1mpmb_ B: Maltoporin (also LamB protein)                                                                                                                                                                                                                                                                                                                                                                                             SCOP domains
               CATH domains 1mpmB00 B:1-421  [code=2.40.170.10, no name defined]                                                                                                                                                                                                                                                                                                                                                                                  CATH domains
               Pfam domains ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author .eeeeeeeeeeeee.........................eeeeeeeeeeeeee..eeeeeeeeeeeee...........eeeeeeeeee...hhh...eeeeeee....eeehhh.eeee...eeeeeee.......eeeeeeeeeeeeeee.......hhh..eeeeeeeeeeeee.......eeeeeeeeeeee..............eeeeeeeeeeeee..eeeeeeeeeeehhh............eee.....eee....eeeeeeeeeeeee....eeeeeeeeeeeeee.....eeeeeeeeeeeee....eeeeeeeeeeeeee.....eeeeeeeeeeeeee.........eeeeeeeeeeeee.eee..............eee..hhh......eeeeeeeeeeeeeee Sec.struct. author
                 SAPs(SNPs) ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- SAPs(SNPs)
                    PROSITE ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- PROSITE
                 Transcript ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Transcript
                 1mpm B   1 VDFHGYARSGIGWTGSGGEQQCFQTTGAQSKYRLGNECETYAELKLGQEVWKEGDKSFYFDTNVAYSVAQQNDWEATDPAFREANVQGKNLIEWLPGSTIWAGKRFYQRHDVHMIDFYYWDISGPGAGLENIDVGFGKLSLAATRSSEAGGSSSFASNNIYDYTNETANDVFDVRLAQMEINPGGTLELGVDYGRANLRDNYRLVDGASKDGWLFTAEHTQSVLKGFNKFVVQYATDSMTSQGKGLSQGSGVAFDNEKFAYNINNNGHMLRILDHGAISMGDNWDMMYVGMYQDINWDNDNGTKWWTVGIRPMYKWTPIMSTVMEIGYDNVESQRTGDKNNQYKITLAQQWQAGDSIWSRPAIRVFATYAKWDEKWGYDYTGNADNNANFGKAVPADFNGGSFGRGDSDEWTFGAQMEIWW 421
                                    10        20        30        40        50        60        70        80        90       100       110       120       130       140       150       160       170       180       190       200       210       220       230       240       250       260       270       280       290       300       310       320       330       340       350       360       370       380       390       400       410       420 

Chain C from PDB  Type:PROTEIN  Length:421
 aligned with LAMB_ECOLI | P02943 from UniProtKB/Swiss-Prot  Length:446

    Alignment length:421
                                    35        45        55        65        75        85        95       105       115       125       135       145       155       165       175       185       195       205       215       225       235       245       255       265       275       285       295       305       315       325       335       345       355       365       375       385       395       405       415       425       435       445 
           LAMB_ECOLI    26 VDFHGYARSGIGWTGSGGEQQCFQTTGAQSKYRLGNECETYAELKLGQEVWKEGDKSFYFDTNVAYSVAQQNDWEATDPAFREANVQGKNLIEWLPGSTIWAGKRFYQRHDVHMIDFYYWDISGPGAGLENIDVGFGKLSLAATRSSEAGGSSSFASNNIYDYTNETANDVFDVRLAQMEINPGGTLELGVDYGRANLRDNYRLVDGASKDGWLFTAEHTQSVLKGFNKFVVQYATDSMTSQGKGLSQGSGVAFDNEKFAYNINNNGHMLRILDHGAISMGDNWDMMYVGMYQDINWDNDNGTKWWTVGIRPMYKWTPIMSTVMEIGYDNVESQRTGDKNNQYKITLAQQWQAGDSIWSRPAIRVFATYAKWDEKWGYDYTGNADNNANFGKAVPADFNGGSFGRGDSDEWTFGAQMEIWW 446
               SCOP domains d1mpmc_ C: Maltoporin (also LamB protein)                                                                                                                                                                                                                                                                                                                                                                                             SCOP domains
               CATH domains 1mpmC00 C:1-421  [code=2.40.170.10, no name defined]                                                                                                                                                                                                                                                                                                                                                                                  CATH domains
               Pfam domains ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author .eeeeeeeeeeeee.........................eeeeeeeeeeeeee..eeeeeeeeeeeee...........eeeeeeeeee...hhh...eeeeeee....eeehhh.eeee...eeeeeee.......eeeeeeeeeeeeeee.......hhh..eeeeeeeeeeeee.......eeeeeeeeeeee..............eeeeeeeeeeeee..eeeeeeeeeeehhh............eee.....eee....eeeeeeeeeeeee....eeeeeeeeeeeeee.....eeeeeeeeeeeee....eeeeeeeeeeeeee.....eeeeeeeeeeeeee.........eeeeeeeeeeeee.eee..............eee..hhh......eeeeeeeeeeeeeee Sec.struct. author
                 SAPs(SNPs) ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- SAPs(SNPs)
                    PROSITE ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- PROSITE
                 Transcript ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Transcript
                 1mpm C   1 VDFHGYARSGIGWTGSGGEQQCFQTTGAQSKYRLGNECETYAELKLGQEVWKEGDKSFYFDTNVAYSVAQQNDWEATDPAFREANVQGKNLIEWLPGSTIWAGKRFYQRHDVHMIDFYYWDISGPGAGLENIDVGFGKLSLAATRSSEAGGSSSFASNNIYDYTNETANDVFDVRLAQMEINPGGTLELGVDYGRANLRDNYRLVDGASKDGWLFTAEHTQSVLKGFNKFVVQYATDSMTSQGKGLSQGSGVAFDNEKFAYNINNNGHMLRILDHGAISMGDNWDMMYVGMYQDINWDNDNGTKWWTVGIRPMYKWTPIMSTVMEIGYDNVESQRTGDKNNQYKITLAQQWQAGDSIWSRPAIRVFATYAKWDEKWGYDYTGNADNNANFGKAVPADFNGGSFGRGDSDEWTFGAQMEIWW 421
                                    10        20        30        40        50        60        70        80        90       100       110       120       130       140       150       160       170       180       190       200       210       220       230       240       250       260       270       280       290       300       310       320       330       340       350       360       370       380       390       400       410       420 

   Legend:   → Mismatch (orange background)
  - → Gap (green background, '-', border residues have a numbering label)
    → Modified Residue (blue background, lower-case, 'x' indicates undefined single-letter code, labelled with number + name)
  x → Chemical Group (purple background, 'x', labelled with number + name, e.g. ACE or NH2)
  extra numbering lines below/above indicate numbering irregularities and modified residue names etc., number ends below/above '|'

 Classification and Annotation

(-) SCOP Domains  (1, 3)

Asymmetric/Biological Unit

(-) CATH Domains  (1, 3)

Asymmetric/Biological Unit
(-)
Class: Mainly Beta (13760)

(-) Pfam Domains  (0, 0)

(no "Pfam Domain" information available for 1MPM)

(-) Gene Ontology  (19, 19)

Asymmetric/Biological Unit(hide GO term definitions)
Chain A,B,C   (LAMB_ECOLI | P02943)
molecular function
    GO:0042958    maltodextrin transmembrane transporter activity    Enables the transfer of maltodextrin, any polysaccharide of glucose residues in beta-(1,4) linkage, from one side of the membrane to the other.
    GO:0015481    maltose transporting porin activity    Catalysis of the transfer of maltose from one side of the membrane to the other. Maltose is the disaccharide 4-O-alpha-D-glucopyranosyl-D-glucopyranose, an intermediate in the enzymatic breakdown of glycogen and starch. This transporter is a porin so enables the energy independent passage of substances, sized less than 1000 Da, across a membrane. The transmembrane portions of porins consist exclusively of beta-strands which form a beta-barrel. They are found in the outer membranes of Gram-negative bacteria, mitochondria, plastids and possibly acid-fast Gram-positive bacteria.
    GO:0015288    porin activity    Catalysis of the transfer of substances, sized less than 1000 Da, from one side of the membrane to the other. The transmembrane portions of porins consist exclusively of beta-strands which form a beta-barrel. They are found in the outer membranes of Gram-negative bacteria, mitochondria, plastids and possibly acid-fast Gram-positive bacteria.
    GO:0005515    protein binding    Interacting selectively and non-covalently with any protein or protein complex (a complex of two or more proteins that may include other nonprotein molecules).
    GO:0001618    virus receptor activity    Combining with a virus component and mediating entry of the virus into the cell.
biological process
    GO:0008643    carbohydrate transport    The directed movement of carbohydrate into, out of or within a cell, or between cells, by means of some agent such as a transporter or pore. Carbohydrates are any of a group of organic compounds based of the general formula Cx(H2O)y.
    GO:0006974    cellular response to DNA damage stimulus    Any process that results in a change in state or activity of a cell (in terms of movement, secretion, enzyme production, gene expression, etc.) as a result of a stimulus indicating damage to its DNA from environmental insults or errors during metabolism.
    GO:0006811    ion transport    The directed movement of charged atoms or small charged molecules into, out of or within a cell, or between cells, by means of some agent such as a transporter or pore.
    GO:0042956    maltodextrin transport    The directed movement of maltodextrin, any polysaccharide of glucose residues in beta-(1,4) linkage, into, out of or within a cell, or between cells, by means of some agent such as a transporter or pore.
    GO:0015768    maltose transport    The directed movement of maltose into, out of or within a cell, or between cells, by means of some agent such as a transporter or pore. Maltose is the disaccharide 4-O-alpha-D-glucopyranosyl-D-glucopyranose, an intermediate in the catabolism of glycogen and starch.
    GO:0055085    transmembrane transport    The process in which a solute is transported across a lipid bilayer, from one side of a membrane to the other
    GO:0006810    transport    The directed movement of substances (such as macromolecules, small molecules, ions) or cellular components (such as complexes and organelles) into, out of or within a cell, or between cells, or within a multicellular organism by means of some agent such as a transporter, pore or motor protein.
    GO:0046718    viral entry into host cell    The process that occurs after viral attachment by which a virus, or viral nucleic acid, breaches the plasma membrane or cell envelope and enters the host cell. The process ends when the viral nucleic acid is released into the host cell cytoplasm.
    GO:0016032    viral process    A multi-organism process in which a virus is a participant. The other participant is the host. Includes infection of a host cell, replication of the viral genome, and assembly of progeny virus particles. In some cases the viral genetic material may integrate into the host genome and only subsequently, under particular circumstances, 'complete' its life cycle.
cellular component
    GO:0009279    cell outer membrane    A lipid bilayer that forms the outermost membrane of the cell envelope; enriched in polysaccharide and protein; the outer leaflet of the membrane contains specific lipopolysaccharide structures.
    GO:0045203    integral component of cell outer membrane    The component of the cell outer membrane consisting of the gene products having at least some part of their peptide sequence embedded in the hydrophobic region of the membrane.
    GO:0016021    integral component of membrane    The component of a membrane consisting of the gene products and protein complexes having at least some part of their peptide sequence embedded in the hydrophobic region of the membrane.
    GO:0016020    membrane    A lipid bilayer along with all the proteins and protein complexes embedded in it an attached to it.
    GO:0046930    pore complex    Any small opening in a membrane that allows the passage of gases and/or liquids.

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 Related Entries

(-) Entries Sharing at Least One Protein Chain (UniProt ID)

UniProtKB/Swiss-Prot
        LAMB_ECOLI | P029431af6 1mal 1mpn 1mpo 1mpq

(-) Related Entries Specified in the PDB File

(no "Related Entries Specified in the PDB File" available for 1MPM)