Function and Biology

THE STRUCTURE OF A COMPLEX BETWEEN THE NC10 ANTIBODY AND INFLUENZA VIRUS NEURAMINIDASE AND COMPARISON WITH THE OVERLAPPING BINDING SITE OF THE NC41 ANTIBODY

Source organisms:
Biochemical function: exo-alpha-(2->8)-sialidase activity
Biological process: viral budding from plasma membrane
Cellular component: virion membrane

EC 3.2.1.18: Exo-alpha-sialidase

Reaction catalysed:
Hydrolysis of alpha-(2->3)-, alpha-(2->6)-, alpha-(2->8)- glycosidic linkages of terminal sialic acid residues in oligosaccharides, glycoproteins, glycolipids, colominic acid and synthetic substrates.
Systematic name:
Acetylneuraminyl hydrolase
Alternative Name(s):
  • Acetylneuraminidase
  • Alpha-neuraminidase
  • N-acylneuraminate glycohydrolase
  • Neuraminidase
  • Sialidase

Sequence family

Pfam Protein family (Pfam)
PF00064
Domain description: Neuraminidase
Occurring in:
  1. Neuraminidase
The deposited structure of PDB entry 1nmb contains 1 copy of Pfam domain PF00064 (Neuraminidase) in Neuraminidase. Showing 1 copy in chain A [auth N].

InterPro InterPro annotations
IPR013106
Domain description: Immunoglobulin V-set domain
Occurring in:
  1. FAB NC10
  2. FAB NC10
IPR001860
Domain description: Glycoside hydrolase, family 34
Occurring in:
  1. Neuraminidase
IPR003599
Domain description: Immunoglobulin subtype
Occurring in:
  1. FAB NC10
  2. FAB NC10
IPR036179
Domain description: Immunoglobulin-like domain superfamily
Occurring in:
  1. FAB NC10
  2. FAB NC10
IPR013783
Domain description: Immunoglobulin-like fold
Occurring in:
  1. FAB NC10
  2. FAB NC10
IPR007110
Domain description: Immunoglobulin-like domain
Occurring in:
  1. FAB NC10
  2. FAB NC10
IPR036278
Domain description: Sialidase superfamily
Occurring in:
  1. Neuraminidase
IPR033654
Domain description: Sialidase, Influenza viruses A/B
Occurring in:
  1. Neuraminidase

Structure domains

CATH CATH domains
2.60.40.10
Class: Mainly Beta
Architecture: Sandwich
Topology: Immunoglobulin-like
Homology: Immunoglobulins
Occurring in:
  1. FAB NC10
  2. FAB NC10
The deposited structure of PDB entry 1nmb contains 1 copy of CATH domain 2.60.40.10 (Immunoglobulin-like) in FAB NC10. Showing 1 copy in chain B [auth L].
The deposited structure of PDB entry 1nmb contains 1 copy of CATH domain 2.60.40.10 (Immunoglobulin-like) in FAB NC10. Showing 1 copy in chain C [auth H].
2.120.10.10
Class: Mainly Beta
Architecture: 6 Propeller
Topology: Neuraminidase
Homology: Neuraminidase
Occurring in:
  1. Neuraminidase
The deposited structure of PDB entry 1nmb contains 1 copy of CATH domain 2.120.10.10 (Neuraminidase) in Neuraminidase. Showing 1 copy in chain A [auth N].
SCOP SCOP annotations
48727
Class: All beta proteins
Fold: Immunoglobulin-like beta-sandwich
Superfamily: Immunoglobulin
Occurring in:
  1. FAB NC10
  2. FAB NC10
The deposited structure of PDB entry 1nmb contains 1 copy of SCOP domain 48727 (V set domains (antibody variable domain-like)) in FAB NC10. Showing 1 copy in chain B [auth L].
The deposited structure of PDB entry 1nmb contains 1 copy of SCOP domain 48727 (V set domains (antibody variable domain-like)) in FAB NC10. Showing 1 copy in chain C [auth H].
50940
Class: All beta proteins
Fold: 6-bladed beta-propeller
Superfamily: Sialidases
Occurring in:
  1. Neuraminidase
The deposited structure of PDB entry 1nmb contains 1 copy of SCOP domain 50940 (Sialidases (neuraminidases)) in Neuraminidase. Showing 1 copy in chain A [auth N].