Structure of PDB 4xis Chain A

Receptor sequence

>4xisA (length=386) Species: 1929 (Streptomyces rubiginosus)

NYQPTPEDRFTFGLWTVGWQGRDPFGDATRRALDPVESVRRLAELGAHGV
TFHDDDLIPFGSSDSEREEHVKRFRQALDDTGMKVPMATTNLFTHPVFKD
GGFTANDRDVRRYALRKTIRNIDLAVELGAETYVAWGGREGAESGGAKDV
RDALDRMKEAFDLLGEYVTSQGYDIRFAIEPKPNEPRGDILLPTVGHALA
FIERLERPELYGVNPEVGHEQMAGLNFPHGIAQALWAGKLFHIDLNGQNG
IKYDQDLRFGAGDLRAAFWLVDLLESAGYSGPRHFDFKPPRTEDFDGVWA
SAAGCMRNYLILKERAAAFRADPEVQEALRASRLDELARPTAADGLQALL
DDRSAFEEFDVDAAAARGMAFERLDQLAMDHLLGAR

3D structure

• PDB: 4xis A metal-mediated hydride shift mechanism for xylose isomerase based on the 1.6 A Streptomyces rubiginosus structures with xylitol and D-xylose.
• Chain: A
• Resolution: 1.6 Å

Enzymatic activity

• Catalytic site (original residue number in PDB): H54 D57 M88 E181 K183 E217 H220 D245 D255 D257 D287
• Catalytic site (residue number reindexed from 1): H53 D56 M87 E180 K182 E216 H219 D244 D254 D256 D286
• Enzyme Commision number: 5.3.1.5: xylose isomerase.

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	XLS	A	H54 W137 E181 H220 D287 R387	H53 W136 E180 H219 D286 R386
BS02	XYS	A	W16 H54 F94 W137 E181 D287	W15 H53 F93 W136 E180 D286
BS03	MN	A	E217 H220 D255 D257	E216 H219 D254 D256
BS04	MN	A	E181 E217 D245 D287	E180 E216 D244 D286

Gene Ontology

Molecular Function

• GO:0000287 magnesium ion binding
• GO:0009045 xylose isomerase activity
• GO:0016853 isomerase activity
• GO:0042802 identical protein binding
• GO:0046872 metal ion binding

Biological Process

• GO:0005975 carbohydrate metabolic process
• GO:0042732 D-xylose metabolic process

Cellular Component

• GO:0005737 cytoplasm

External links

• PDB: RCSB:4xis, PDBe:4xis, PDBj:4xis
• PDBsum: 4xis
• PubMed: 2006134
• UniProt: P24300|XYLA_STRRU Xylose isomerase (Gene Name=xylA)