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Structure paper

TitleDevelopment and characterization of functional antibodies targeting NMDA receptors.
Journal, issue, pagesNat Commun, Vol. 13, Issue 1, Page 923, Year 2022
Publish dateFeb 17, 2022
AuthorsNami Tajima / Noriko Simorowski / Remy A Yovanno / Michael C Regan / Kevin Michalski / Ricardo Gómez / Albert Y Lau / Hiro Furukawa /
PubMed AbstractN-methyl-D-aspartate receptors (NMDARs) are critically involved in basic brain functions and neurodegeneration as well as tumor invasiveness. Targeting specific subtypes of NMDARs with distinct ...N-methyl-D-aspartate receptors (NMDARs) are critically involved in basic brain functions and neurodegeneration as well as tumor invasiveness. Targeting specific subtypes of NMDARs with distinct activities has been considered an effective therapeutic strategy for neurological disorders and diseases. However, complete elimination of off-target effects of small chemical compounds has been challenging and thus, there is a need to explore alternative strategies for targeting NMDAR subtypes. Here we report identification of a functional antibody that specifically targets the GluN1-GluN2B NMDAR subtype and allosterically down-regulates ion channel activity as assessed by electrophysiology. Through biochemical analysis, x-ray crystallography, single-particle electron cryomicroscopy, and molecular dynamics simulations, we show that this inhibitory antibody recognizes the amino terminal domain of the GluN2B subunit and increases the population of the non-active conformational state. The current study demonstrates that antibodies may serve as specific reagents to regulate NMDAR functions for basic research and therapeutic objectives.
External linksNat Commun / PubMed:35177668 / PubMed Central
MethodsEM (single particle) / X-ray diffraction
Resolution2.456 - 7.51 Å
Structure data

EMDB-25843, PDB-7te9:
Cryo-EM structure of GluN1b-2B NMDAR complexed to Fab2 class1
Method: EM (single particle) / Resolution: 3.92 Å

EMDB-25844, PDB-7teb:
Cryo-EM structure of GluN1b-2B NMDAR complexed to Fab2 non-active1-like
Method: EM (single particle) / Resolution: 4.23 Å

EMDB-25845, PDB-7tee:
Cryo-EM structure of GluN1b-2B NMDAR complexed to Fab2 Non-active2-like
Method: EM (single particle) / Resolution: 6.59 Å

EMDB-25849, PDB-7teq:
Cryo-EM structure of GluN1b-2B NMDAR in complex with Fab5 active conformation
Method: EM (single particle) / Resolution: 7.51 Å

EMDB-25850, PDB-7ter:
Cryo-EM structure of GluN1b-2B NMDAR in complex with Fab5 non-active2 conformation
Method: EM (single particle) / Resolution: 5.23 Å

EMDB-25851, PDB-7tes:
Cryo-EM structure of GluN1b-2B NMDAR in complex with Fab5 in Non-active1 conformation
Method: EM (single particle) / Resolution: 4.7 Å

EMDB-25852, PDB-7tet:
Cryo-EM structure of GluN1b-2B NMDAR in complex with Fab5 in non-active2-like conformation
Method: EM (single particle) / Resolution: 4.45 Å

PDB-7te4:
Crystal structure of Fab2 anti-GluN2B antibody
Method: X-RAY DIFFRACTION / Resolution: 2.456 Å

PDB-7te6:
Crystal structure of GluN1b-2B ATD complexed to Fab5 anti-GluN2B antibody
Method: X-RAY DIFFRACTION / Resolution: 4.55 Å

Chemicals

ChemComp-HOH:
WATER

Source
  • rattus norvegicus (Norway rat)
  • Mouse (mice)
  • mus musculus (house mouse)
  • xenopus laevis (African clawed frog)
KeywordsIMMUNE SYSTEM / Fab fragment / SIGNALING PROTEIN/IMMUNE SYSTEM / Fab fragment complexed to the receptor / SIGNALING PROTEIN-IMMUNE SYSTEM complex / Channel / antibody

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