Structure of PDB 1kkt Chain A

Receptor sequence

>1kktA (length=475) Species: 5077 (Penicillium citrinum)

SNQAKADAVKEAFQHAWNGYMKYAFPHDELTPVSNGHADSRNGWGASAVD
ALSTAVIMGKADVVNAILEHVADIDFSKTSDTVSLFETTIRYLAGMLSGY
DLLQGPAKNLVDNQDLIDGLLDQSRNLADVLKFAFDTPSGVPYNNINITS
HGNDGATTNGLAVTGTLVLEWTRLSDLTGDEEYAKLSQKAESYLLKPQPS
SSEPFPGLVGSSININDGQFADSRVSWNGGDDSFYEYLIKMYVYDPKRFE
TYKDRWVLAAESTIKHLKSHPKSRPDLTFLSSYSNRNYDLSSQHLTCFDG
GSFLLGGTVLDRQDFIDFGLELVDGCEATYNSTLTKIGPDSWGWDPKKVP
SDQKEFYEKAGFYISSGSYVLRPEVIESFYYAHRVTGKEIYRDWVWNAFV
AINSTCRTDSGFAAVSDVNKANGGSKYDNQESFLFAEVMKYSYLAHSEDA
AWQVQKGGKNTFVYNTEAHPISVAR

3D structure

• PDB: 1kkt Structure of Penicillium citrinum alpha 1,2-mannosidase reveals the basis for differences in specificity of the endoplasmic reticulum and Golgi class I enzymes.
• Chain: A
• Resolution: 2.2 Å

Enzymatic activity

• Catalytic site (original residue number in PDB): E122 R126 D267 E409
• Catalytic site (residue number reindexed from 1): E87 R91 D232 E374
• Enzyme Commision number: 3.2.1.113: mannosyl-oligosaccharide 1,2-alpha-mannosidase.

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	MAN	A	L355 Y426	L320 Y391

Gene Ontology

Molecular Function

• GO:0004571 mannosyl-oligosaccharide 1,2-alpha-mannosidase activity
• GO:0005509 calcium ion binding

Biological Process

• GO:0005975 carbohydrate metabolic process

Cellular Component

• GO:0016020 membrane

External links

• PDB: RCSB:1kkt, PDBe:1kkt, PDBj:1kkt
• PDBsum: 1kkt
• PubMed: 11714724
• UniProt: P31723|MAN12_PENCI Mannosyl-oligosaccharide alpha-1,2-mannosidase (Gene Name=MSDC)