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

More

3D View:  4R8P

Style

Color

Spin

Learn
PDB data help explain fundamental biology, biomedicine, bioengineering/biotechnology, and energy sciences
Feature Focus
Use PDB-101 resources to learn how researchers are using biology in industry
Teach
The RCSB PDB Curricula provide authentic, hands-on teaching materials, individual and group activities and assessment suggestions
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.

Images used with permission from the Howard Hughes Medical Institute (www.hhmi.org). All rights reserved.

Myoglobin Fold

Deoxyribonucleic Acid (DNA)

Deoxyhemoglobin

Cytochrome c (unbound)

Tomato Bushy Stunt Virus (TBSV)

Oxyhemoglobin

Lysozyme (488)

Induced Lac Repressor

DNA

Aspartate Transcarbamoylase (ATCase)

Hemoglobin

DPG-Hemoglobin Complex

A-DNA

Immunoglobulin G (IgG)

TATA-Binding Protein (TBP)

Intermolecular Contacts in Hemoglobin S

Lysozyme (512)

Ribonuclease S

Hemoglobin (1000)

Trypsin

Collagen

Myoglobin

Lac Repressor

Z-DNA

Myohemerythrin

Transfer Ribonucleic Acid (tRNA)

Carboxypeptidase A

Hemoglobin S

Crambin

B-DNA

Cytochrome c

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

Biosites: Blood Plasma

Escherichia coli Bacterium

SARS-CoV-2 Fusion

Mycoplasma mycoides

Measles Virus Proteins

Influenza Vaccine

Kinetochore

SARS-CoV-2 mRNA Vaccine

Excitatory and Inhibitory Synapses

Lipid Droplets

Casein Micelle and Fat Globule in Milk

Escherichia coli

CytoSkeleton

Biosites: Nucleus

Respiratory Droplet

Biosites: Red Blood Cell

Autophagy

Last Universal Common Ancestor

Influenza Virus

Transfer RNA and Gag Protein

Cellulose Synthase

JCVI-syn3A Minimal Cell

SARS-CoV-2 and Neutralizing Antibodies

Coronavirus Life Cycle

RecA and DNA

Myoglobin in a Whale Muscle Cell

Insulin Release

Abiogenesis

Collagen and Extracellular Matrix

HIV in Blood Plasma

Ebola Virus

Myelin

HIV-Infected Cell

Chloroplast

Blood

HIV Vaccine

Phage-based COVID-19 Vaccine

Biosites: Cytoplasm

Poliovirus Neutralization

Zika Virus

Red Blood Cell Cytoskeleton

Biosites: Basement Membrane

Caulobacter Polar Microdomain

Bacteriophage T4 Infection

Vascular Endothelial Growth Factor (VegF) Signaling

Biosites: Muscle

Coronavirus

Insulin Action

Model of a Mycoplasma Cell

Immunological Synapse