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Structural Biology
Structural Biology Services

Structural Biology
Overview

ICDMO delivers high-resolution three-dimensional structures of proteins, nucleic acids, and macromolecular complexes using the full portfolio of modern structural biology techniques — from X-ray crystallography and Cryo-EM through NMR, SAXS, and structure-based drug design.

X-Ray CrystallographyCryo-EMNMRSAXSSBDD
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5
Techniques
200+
Structures Solved
1.0 Å
Best Resolution
1–3
Months End-to-End
100%
PDB Deposition
What We Offer

Comprehensive 3D Structure Determination Across Five Platforms

Three-dimensional structure determination lies at the heart of modern drug discovery, mechanistic biology, and protein engineering. Understanding how a protein folds, where substrates and inhibitors bind, and how multi-protein complexes assemble provides the molecular basis for rational therapeutic design.

ICDMO's structural biology platform spans the complete toolkit — from atomic-resolution X-ray crystallography and Cryo-EM through solution-state NMR, rapid SAXS characterization, and fully integrated structure-based drug design. All techniques are delivered under one roof, enabling seamless integrative structural projects.

Suitable For
Drug targets requiring atomic-resolution binding-site characterization
Membrane proteins, GPCRs, and ion channels (Cryo-EM)
Proteins < 50 kDa with dynamic or disordered regions (NMR)
Multi-subunit complexes and assemblies > 200 kDa (Cryo-EM)
Rapid solution-state shape and oligomeric state profiling (SAXS)
Fragment screening and iterative lead optimization campaigns (SBDD)
Mechanism of action studies: substrate, TS, and product complexes
Protein Structures
Representative structure • 1.8 Å resolution
Solved In-House
200+
Protein Structures Resolved

ICDMO's structural database covers enzymes, kinases, GPCRs, and multi-protein complexes — enabling rapid comparative analysis and template-guided phasing for new targets that fall within known fold families.

Laboratory
Gene-to-structure • Full pipeline
One-Stop Service
1–3
months
Gene-to-Structure Timeline

Our one-stop service handles every step from gene synthesis and protein production through crystallization or Cryo-EM sample preparation, data collection at synchrotron beamlines, and final PDB deposition — no handoffs between vendors.

Cryo-EM
X-Ray · Cryo-EM · NMR · SAXS · SBDD
Multi-Platform
5
Complementary Structural Platforms

Our scientists routinely combine multiple techniques in integrative structural projects — SAXS for solution validation of crystal forms, NMR for dynamics characterization of Cryo-EM structures, and SBDD for translating structures into lead compounds.

Service Workflow

From Protein to PDB Deposition

01
01

Protein Production

Gene construct design & codon optimization for expression host
E. coli periplasmic, baculovirus/Sf9, or HEK-293 mammalian expression
Affinity (IMAC, Protein A/G) & polishing SEC chromatography
QC panel: SDS-PAGE, DLS, thermal shift assay, SEC-MALS
02
02

Crystallization Screening

High-throughput 96-well sitting-drop & hanging-drop vapor diffusion
2,000+ commercial conditions (Hampton, Molecular Dimensions, Rigaku)
Mosquito and Crystal Gryphon nanoliter dispensing robots
UV CrysCam imaging to distinguish protein vs. salt crystals
03
03

Crystallization Optimization

Fine-tuning pH, precipitant concentration, additives, and temperature
Streak seeding and micro-seed matrix screening (MMS)
Detergent & lipidic cubic phase (LCP) screens for membrane proteins
Co-crystallization and soaking with ligands, inhibitors, or cofactors
04
04

Data Collection & Phasing

Synchrotron radiation beamlines: Diamond, ESRF, APS, SSRF, Spring 8
In-house Cu Kα source for preliminary space-group screening
Cryo-EM: 300 kV FEG instrument, Falcon 4 / K3 direct electron detector
Phasing: MR, SAD/MAD; cryoSPARC / RELION for Cryo-EM SPA
05
05

Structure Determination & Reporting

Iterative model building: Coot, ISOLDE; refinement: PHENIX, REFMAC5, BUSTER
Stringent validation: MolProbity, Rfree, CC*, Ramachandran statistics
PDB deposition with full structure factor / EM map files
Manuscript-quality PyMOL figures and biological interpretation report
Our Techniques

Five Platforms, Full Structural Coverage

Each technique provides unique, complementary information. Our scientists guide you to the right approach for your specific target, timeline, and scientific question.

X-Ray Crystallography
Gold Standard

X-Ray Crystallography

Small–medium proteins, enzyme–ligand complexes, FBDD campaigns

Resolution
1.0 – 3.5 Å
Turnaround
4 – 12 wks
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Cryo-Electron Microscopy
No Crystals Needed

Cryo-Electron Microscopy

Large complexes, membrane proteins, flexible assemblies

Resolution
2.5 – 8 Å
Turnaround
6 – 16 wks
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NMR Spectroscopy
Solution Dynamics

NMR Spectroscopy

Dynamics, fragment binding screening, proteins < 50 kDa

Resolution
Atomic (sol.)
Turnaround
4 – 16 wks
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SAXS
Fastest Turnaround

SAXS

Shape, oligomeric state, flexible multi-domain proteins

Resolution
10 – 100 Å
Turnaround
1 – 3 wks
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Structure-Based Drug Design
Drug Discovery Focus

Structure-Based Drug Design

Fragment screening, lead optimization, selectivity profiling

Resolution
1.5 – 2.5 Å
Turnaround
Per cycle
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Applications

Where Structural Biology Makes the Difference

🔬

Drug Target Validation

Confirm druggability; identify binding pockets, allosteric sites and conformational flexibility for rational drug design.

🧩

Fragment-Based Drug Discovery

Crystallographic screening of 500–1,000 fragment libraries to identify novel chemical starting points for your programme.

📈

Lead Optimization

Iterative co-crystal structures guide SAR: visualize binding modes, optimize key interactions and improve selectivity.

⚙️

Mechanism of Action Studies

Capture substrate, transition-state and product complexes to understand catalytic mechanisms and allosteric regulation.

🔧

Protein Engineering

Rational enzyme variant design, antibody humanization, and protein–protein interface engineering guided by atomic structure.

📋

Regulatory & IP Support

High-quality structures for IND applications, biosimilar comparability studies, and patent binding-mode novelty filings.

Case Studies

Representative Projects

Kinase–Inhibitor Co-Crystal Structure
X-Ray Crystallography
1.8 Å

Kinase–Inhibitor Co-Crystal Structure

Full-length DYRK1A kinase domain co-crystallized with a lead series inhibitor. Structure revealed an unexpected DFG-out binding mode, directly enabling medicinal chemistry vector optimization that improved potency 40-fold.

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GPCR–G Protein Complex
Cryo-EM
3.2 Å

GPCR–G Protein Complex

Cryo-EM structure of a class B GPCR in complex with heterotrimeric Gs protein. Single-particle analysis at 3.2 Å resolution defined transmembrane helix packing and identified a cryptic allosteric pocket inaccessible to crystallography.

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Technique Comparison & Timeline

TechniqueResolutionSample RequirementTurnaroundBest Application
X-Ray Crystallography1.0–3.5 Å5–20 mg protein4–12 weeksLigand binding, FBDD, atomic detail
Cryo-EM (SPA)2.5–6 Å0.5–2 mg (0.5–5 µM)6–16 weeksLarge complexes, membrane proteins
NMR SpectroscopyAtomic (sol.)1–5 mM, ¹⁵N/¹³C labelled4–16 weeksDynamics, fragment screening, IDPs
SAXS (SEC-SAXS)10–100 Å2–5 mg (1–10 mg/mL)1–3 weeksShape, oligomeric state, flexibility
SBDD1.5–2.5 ÅProtein + compound setsPer SBDD cycleHit-to-lead, lead optimization, SAR

Note: Timelines are estimates for well-behaved samples. Challenging targets may require additional optimization. Contact us for a free feasibility assessment before project initiation.

Free Feasibility Assessment

Share your target details and our structural biologists will recommend the best technique and provide a no-obligation project plan within 24 hours.

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Standard Deliverables

Atomic coordinate file (PDB format)
Structure factor or EM map file
Refinement & validation statistics
Publication-quality PyMOL figures
Biological interpretation report
PDB deposition assistance

Quick Inquiry

Ready to Solve Your Protein Structure?

Submit your target information for a free feasibility assessment. Our structural biologists will recommend the optimal technique and turnaround for your project within 24 hours.

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