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Molecule of the Month

August 2026

Histone Ubiquitination and Deubiquitination Complexes

Enzymes that add and remove marks from chromosomes to keep gene regulation in balance

3D View: 4R8P

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Cartoon Spheres Surface

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Rainbow Chain Structure

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Training Resources Spotlight

Guide to Understanding PDB Data

Guided reference for methods of obtaining, exploration, and interpretation of PDB entries

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Recorded lectures and related resources

Featured:

Exploring the Workhorses of Biotechnology: Using RCSB.org to analyze plastic-degrading enzymes

Education Corner PDB & Data Archiving Curriculum

News and Events

PDB-101 Focus: Biotechnology

» 08/17/2026

Guide to Understanding PDB Data: 3D ED/MicroED

» 08/03/2026

Watch the Webinar: Exploring Integrative Structures with RCSB.org

» 07/27/2026

PDB-101 Focus: Biotechnology

» 07/20/2026

» 07/16/2026

Meet RCSB PDB at The Protein Society

» 07/15/2026

Summer Newsletter Published

» 07/15/2026

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Use PDB-101 resources to learn how researchers are using biology in industry

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SciArt Galleries

Irving Geis (1908-1997) was a gifted artist who helped illuminate the field of structural biology with his iconic images. The Geis Digital Archive features many of his illustrations in the context of their molecular structures.

A-DNA

Hemoglobin (1000)

B-DNA

Deoxyribonucleic Acid (DNA)

Deoxyhemoglobin

Hemoglobin

Cytochrome c (unbound)

Z-DNA

Myoglobin Fold

Lysozyme (488)

Cytochrome c

Carboxypeptidase A

DNA

Aspartate Transcarbamoylase (ATCase)

TATA-Binding Protein (TBP)

Collagen

Lysozyme (512)

DPG-Hemoglobin Complex

Ribonuclease S

Crambin

Trypsin

Myoglobin

Myohemerythrin

Lac Repressor

Induced Lac Repressor

Tomato Bushy Stunt Virus (TBSV)

Oxyhemoglobin

Hemoglobin S

Immunoglobulin G (IgG)

Transfer Ribonucleic Acid (tRNA)

Intermolecular Contacts in Hemoglobin S

The Molecular Landscapes by David S. Goodsell integrate information from structural biology, microscopy and biophysics to simulate detailed views of the molecular structure of living cells.

Illustrations are free for use under a CC-BY-4.0 license