7OTD

Oxytocin NMR solution structure

PDB DOI: https://doi.org/10.2210/pdb7OTD/pdb
BMRB: 34637

Classification: HORMONE
Organism(s): Homo sapiens
Mutation(s): No

Deposited: 2021-06-10 Released: 2021-10-13
Deposition Author(s): Shalev, D.E., Alshanski, I., Yitzchaik, S., Hurevich, M.
Funding Organization(s): European Union (EU)

Experimental Data Snapshot

Method: SOLUTION NMR
Conformers Calculated: 50
Conformers Submitted: 10
Selection Criteria: structures with the lowest energy

wwPDB Validation 3D Report Full Report

This is version 1.0 of the entry. See complete history.

Literature

Determining the structure and binding mechanism of oxytocin-Cu 2+ complex using paramagnetic relaxation enhancement NMR analysis.

Alshanski, I., Shalev, D.E., Yitzchaik, S., Hurevich, M.

(2021) J Biol Inorg Chem 26: 809-815

PubMed: 34459989 Search on PubMedSearch on PubMed Central
DOI: https://doi.org/10.1007/s00775-021-01897-1
Primary Citation of Related Structures:
7OFG, 7OTD

PubMed Abstract:
Oxytocin is a neuropeptide that binds copper ions in nature. The structure of oxytocin in interaction with Cu ²⁺ was determined here by NMR, showing which atoms of the peptide are involved in binding. Paramagnetic relaxation enhancement NMR analyses indicated a binding mechanism where the amino terminus was required for binding and subsequently Tyr2, Ile3 and Gln4 bound in that order. The aromatic ring of Tyr2 formed a π-cation interaction with Cu ²⁺. Oxytocin copper complex structure revealed by paramagnetic relaxation enhancement NMR analyses.

Organizational Affiliation

Institute of Chemistry and Center for Nanoscience and Nanotechnology, The Hebrew University of Jerusalem, Edmond J. Safra Campus, Givat Ram, 91904, Jerusalem, Israel.

Macromolecule Content

Total Structure Weight: 1.09 kDa
Atom Count: 70
Modelled Residue Count: 9
Deposited Residue Count: 9
Unique protein chains: 1

Macromolecules

Find similar proteins by: Sequence | 3D Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
UNK-TYR-ILE-GLN-ASN-CYS-PRO-LEU-GLY	A	9	Homo sapiens	Mutation(s): 0
UniProt & NIH Common Fund Data Resources
Find proteins for P01178 (Homo sapiens) Explore P01178 Go to UniProtKB: P01178
PHAROS: P01178 GTEx: ENSG00000101405
Entity Groups
UniProt Group	P01178
Sequence Annotations Expand
Reference Sequence

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram	3D Interactions
CU Query on CU Download Ideal Coordinates CCD File SDF format, chain B [auth A] MOL2 format, chain B [auth A]	B [auth A]	COPPER (II) ION Cu JPVYNHNXODAKFH-UHFFFAOYSA-N		Interactions Focus chain B [auth A]
NH2 Query on NH2 Download Ideal Coordinates CCD File SDF format, chain C [auth A] MOL2 format, chain C [auth A]	C [auth A]	AMINO GROUP H₂ N QGZKDVFQNNGYKY-UHFFFAOYSA-N		Interactions Focus chain C [auth A]