Structure of PDB 4h53 Chain B Binding Site BS04

Receptor Information

>4h53 Chain B (length=388) Species: 382827 (Influenza A virus (A/RI/5+/1957(H2N2)))

VEYRNWSKPQCQITGFAPFSKDNSIRLSAGGDIWVTREPYVSCDPGKCYQ
FALGQGTTLDNKHSNDTVHDRIPHRTLLMNELGVPFHLGTRQVCIAWSSS
SCHDGKAWLHVCITGDDKNATASFIYDGRLVDSIGSWSQNILRTQESECV
CINGTCTVVMTDGSASGRADTRILFIEEGKIVHISPLSGSAQHIEECSCY
PRYPGVRCICRDNWKGSNRPVVDINMEDYSIDSSYVCSGLVGDTPRNDDS
SSNSNCRNPNNERGTQGVKGWAFDNGNDLWMGRTISKESRSGYETFKVIG
GWSTPNSKSQVNRQVIVDNNNWSGDSGIFSVEGKSCINRCFYVELIRGRP
QETRVWWTSNSIVVFCGTSGTYGTGSWPDGANINFMPI

Ligand information

• Ligand ID: CA
• InChI: InChI=1S/Ca/q+2
• InChIKey: BHPQYMZQTOCNFJ-UHFFFAOYSA-N
• SMILES:
  CACTVS 3.341: [Ca++]
  ACDLabs 10.04
  OpenEye OEToolkits 1.5.0: [Ca+2]
• Formula: Ca
• Name: CALCIUM ION
• DrugBank: DB14577
• PDB chain: 4h53 Chain B Residue 501

Receptor-Ligand Complex Structure

Structure summary

• PDB: 4h53 Influenza neuraminidase operates via a nucleophilic mechanism and can be targeted by covalent inhibitors
• Resolution: 1.5 Å
• Binding residue (original residue number in PDB): D293 G297 D324 G345 Q347
• Binding residue (residue number reindexed from 1): D212 G216 D243 G264 Q266
• Annotation score: 4

Enzymatic activity

• Catalytic site (original residue number in PDB): D151 E277 R292 R371 D406
• Catalytic site (residue number reindexed from 1): D70 E196 R211 R290 D325
• Enzyme Commision number: 3.2.1.18: exo-alpha-sialidase.

Gene Ontology

Molecular Function

• GO:0004308 exo-alpha-sialidase activity

Biological Process

• GO:0005975 carbohydrate metabolic process
• GO:0046761 viral budding from plasma membrane

Cellular Component

• GO:0016020 membrane
• GO:0033644 host cell membrane
• GO:0055036 virion membrane

External links

• PDB: RCSB:4h53, PDBe:4h53, PDBj:4h53
• PDBsum: 4h53
• PubMed: 23422659
• UniProt: Q194T1