Structure of PDB 3k8k Chain A

Receptor sequence
>3k8kA (length=650) Species: 818 (Bacteroides thetaiotaomicron) [Search protein sequence]
QWTALTASPDTWDETKRADISYQLLLYSFADSDGDGYGDLNGVTQKLDYL
NQLGVKALWLSPIHPCMSYHGYDVTDYTKVNPQLGTESDFDRLVTEAHNR
GIKIYLDYVMNHTGTAHPWFTEASSSSESPYRNYYSFSEDPKTDIAAGKI
AMITQEGAAGYNAAEWFQVSDETAAVKGLLKFTLDWSNAPSPILVVSTGT
KADEDNPDTGTDNAKYLYYGEDICKKFYDKGNNIYELTVDFESTWGLLIR
TSNASFWPSGTKYGASSSSEKLALNKDFKLTNAGNPANIMFDSQQITYFH
SHFCTDWFADLNYGPVDQAGESPAYQAIADAAKGWIARGVDGLRLDAVKH
IYHSETSEENPRFLKMFYEDMNAYYKQKGHTDDFYMIGEVLSEYDKVAPY
YKGLPALFEFSFWYRLEWGINNSTGCYFAKDILSYQQKYANYRSDYIEAT
KLSNHDEDRTSSKLGKSADKCKLAAAVLLTSAGHPYIYYGEELGLYGTKD
NGDEYVRSPMLWGDSYTTNYTDKTDATVSKNVKTVADQQADTHSLLNIYF
SLTRLRNTYPALAEGNMTKHSVYNESQEKDYKPIAAWYMTKDNEKLLVIH
NFGGTAMQLPLTDKIEKVLFVNGETQQNTDSDSYTLKLGGYASVVFKLGN
3D structure
PDB3k8k SusG: A Unique Cell-Membrane-Associated alpha-Amylase from a Prominent Human Gut Symbiont Targets Complex Starch Molecules.
ChainA
Resolution2.2 Å
3D
structure
Catalytic site residues are labeled in the structure
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Enzymatic activity
Catalytic site (original residue number in PDB) D149 R386 D388 E431 H497 D498
Catalytic site (residue number reindexed from 1) D107 R344 D346 E389 H455 D456
Enzyme Commision number 3.2.1.1: alpha-amylase.
Interaction with ligand
Site
#		 Ligand Ligand
chain		 Binding residues on receptor
(original residue number in PDB)		 Binding residues on receptor
(residue number reindexed from 1)		 Binding affinity
BS01 MG A D73 D75 D77 Y79 D81 D31 D33 D35 Y37 D39
BS02 CA A N153 D352 H392 I393 N111 D310 H350 I351
Gene Ontology
Molecular Function
GO:0000287 magnesium ion binding
GO:0004556 alpha-amylase activity
GO:0005509 calcium ion binding
GO:0016798 hydrolase activity, acting on glycosyl bonds
GO:0046872 metal ion binding
GO:2001070 starch binding
Biological Process
GO:0000272 polysaccharide catabolic process
GO:0005975 carbohydrate metabolic process
GO:0005983 starch catabolic process
GO:0009313 oligosaccharide catabolic process
Cellular Component
GO:0009279 cell outer membrane
GO:0019867 outer membrane

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Molecular Function
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Biological Process
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Cellular Component
External links
PDB RCSB:3k8k, PDBe:3k8k, PDBj:3k8k
PDBsum3k8k
PubMed20159465
UniProtQ8A1G3|SUSG_BACTN Alpha-amylase SusG (Gene Name=susG)

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