4I7Y

Crystal Structure of Human Alpha Thrombin in Complex with a 27-mer Aptamer Bound to Exosite II

PDB DOI: https://doi.org/10.2210/pdb4I7Y/pdb
NAKB: 4I7Y

Classification: HYDROLASE/HYDROLASE INHIBITOR/DNA
Organism(s): Homo sapiens, synthetic construct
Mutation(s): No

Deposited: 2012-12-01 Released: 2013-10-16
Deposition Author(s): Pica, A., Russo Krauss, I., Merlino, A., Mazzarella, L., Sica, F.

Experimental Data Snapshot

Method: X-RAY DIFFRACTION
Resolution: 2.40 Å
R-Value Free: 0.249
R-Value Work: 0.181
R-Value Observed: 0.184

wwPDB Validation 3D Report Full Report

Ligand Structure Quality Assessment

This is version 1.4 of the entry. See complete history.

Literature

Duplex-quadruplex motifs in a peculiar structural organization cooperatively contribute to thrombin binding of a DNA aptamer.

Russo Krauss, I., Pica, A., Merlino, A., Mazzarella, L., Sica, F.

(2013) Acta Crystallogr D Biol Crystallogr 69: 2403-2411

PubMed: 24311581 Search on PubMed
DOI: https://doi.org/10.1107/S0907444913022269
Primary Citation of Related Structures:
4I7Y

PubMed Abstract:
Potent second-generation thrombin aptamers adopt a duplex-quadruplex bimodular folding and recognize thrombin exosite II with very high affinity and specificity. A sound model of these oligonucleotides, either free or in complex with thrombin, is not yet available. Here, a structural study of one of these aptamers, HD22-27mer, is presented. The crystal structure of this aptamer in complex with thrombin displays a novel architecture in which the helical stem is enchained to a pseudo-G-quadruplex. The results also underline the role of the residues that join the duplex and quadruplex motifs and control their recruitment in thrombin binding.

Organizational Affiliation

Department of Chemical Sciences, University of Naples `Federico II', Complesso Universitario di Monte Sant'Angelo, I-80126 Naples, Italy.

Macromolecule Content

Total Structure Weight: 43.06 kDa
Atom Count: 2,951
Modelled Residue Count: 304
Deposited Residue Count: 322
Unique protein chains: 2
Unique nucleic acid chains: 1

Macromolecules

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(by identity cutoff) | 3D Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Prothrombin	A [auth H]	259	Homo sapiens	Mutation(s): 0 EC: 3.4.21.5
UniProt & NIH Common Fund Data Resources
Find proteins for P00734 (Homo sapiens) Explore P00734 Go to UniProtKB: P00734
PHAROS: P00734 GTEx: ENSG00000180210
Entity Groups
Sequence Clusters	30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt Group	P00734
Glycosylation
Glycosylation Sites: 1	Glycosylation Focus chain A [auth H]	Go to GlyGen: P00734-1
Sequence Annotations Expand
Reference Sequence

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(by identity cutoff) | 3D Structure

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
Prothrombin	B [auth L]	36	Homo sapiens	Mutation(s): 0 EC: 3.4.21.5
UniProt & NIH Common Fund Data Resources
Find proteins for P00734 (Homo sapiens) Explore P00734 Go to UniProtKB: P00734
PHAROS: P00734 GTEx: ENSG00000180210
Entity Groups
Sequence Clusters	30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt Group	P00734
Sequence Annotations Expand
Reference Sequence

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(by identity cutoff) | 3D Structure

Entity ID: 3
Molecule	Chains	Length	Organism	Image
DNA (27-MER)	C [auth D]	27	synthetic construct
Sequence Annotations Expand
Reference Sequence

Small Molecules

Ligands 3 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram	3D Interactions
0G6 Query on 0G6 Download Ideal Coordinates CCD File SDF format, chain D [auth H] MOL2 format, chain D [auth H] mmCIF format, chain D [auth H]	D [auth H]	D-phenylalanyl-N-[(2S,3S)-6-{[amino(iminio)methyl]amino}-1-chloro-2-hydroxyhexan-3-yl]-L-prolinamide C₂₁ H₃₄ Cl N₆ O₃ DVFLYEYCMMLBTQ-VSZNYVQBSA-O		Interactions Focus chain D [auth H]
NAG Query on NAG Download Ideal Coordinates CCD File SDF format, chain F [auth L] MOL2 format, chain F [auth L] mmCIF format, chain F [auth L]	F [auth L]	2-acetamido-2-deoxy-beta-D-glucopyranose C₈ H₁₅ N O₆ OVRNDRQMDRJTHS-FMDGEEDCSA-N		Interactions Focus chain F [auth L]
NA Query on NA Download Ideal Coordinates CCD File SDF format, chain E [auth H] MOL2 format, chain E [auth H] mmCIF format, chain E [auth H]	E [auth H]	SODIUM ION Na FKNQFGJONOIPTF-UHFFFAOYSA-N		Interactions Focus chain E [auth H]

Biologically Interesting Molecules (External Reference) 1 Unique

Entity ID: 4
ID	Chains	Name	Type/Class	2D Diagram	3D Interactions
PRD_000020 (0G6) Query on PRD_000020	D [auth H]	D-Phe-Pro-Arg-CH2Cl	Peptide-like / Inhibitor		Interactions Focus chain D [auth H]

Experimental Data & Validation

Experimental Data

Method: X-RAY DIFFRACTION
Resolution: 2.40 Å
R-Value Free: 0.249
R-Value Work: 0.181
R-Value Observed: 0.184
Space Group: P 1 2₁ 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 48.144	α = 90
b = 81.904	β = 99.66
c = 53.72	γ = 90

Software Package:

Software Name	Purpose
DENZO	data reduction
PHASER	phasing
REFMAC	refinement
HKL-2000	data reduction
HKL-2000	data scaling

Structure Validation

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Ligand Structure Quality Assessment

Entry History

Deposition Data

Released Date: 2013-10-16

Deposition Author(s):

Revision History (Full details and data files)

Version 1.0: 2013-10-16
Type: Initial release
Version 1.1: 2013-12-11
Changes: Database references
Version 1.2: 2014-01-01
Changes: Database references
Version 1.3: 2020-07-29
Type: Remediation
Reason: Carbohydrate remediation
Changes: Data collection, Derived calculations, Structure summary
Version 1.4: 2024-10-09
Changes: Data collection, Database references, Structure summary