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.

Immunoglobulin G (IgG)

Hemoglobin (1000)

Lysozyme (512)

Carboxypeptidase A

Cytochrome c (unbound)

DPG-Hemoglobin Complex

A-DNA

Trypsin

Ribonuclease S

Aspartate Transcarbamoylase (ATCase)

Deoxyhemoglobin

Collagen

Lysozyme (488)

Hemoglobin S

Myoglobin Fold

DNA

Crambin

Induced Lac Repressor

Z-DNA

Lac Repressor

Cytochrome c

Tomato Bushy Stunt Virus (TBSV)

Transfer Ribonucleic Acid (tRNA)

Myoglobin

Intermolecular Contacts in Hemoglobin S

B-DNA

Hemoglobin

TATA-Binding Protein (TBP)

Myohemerythrin

Oxyhemoglobin

Deoxyribonucleic Acid (DNA)

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

Transfer RNA and Gag Protein

Phage-based COVID-19 Vaccine

Biosites: Red Blood Cell

Influenza Virus

SARS-CoV-2 and Neutralizing Antibodies

Model of a Mycoplasma Cell

Poliovirus Neutralization

Escherichia coli

Chloroplast

Myelin

Kinetochore

Insulin Action

RecA and DNA

Mycoplasma mycoides

JCVI-syn3A Minimal Cell

Myoglobin in a Whale Muscle Cell

Cellulose Synthase

Biosites: Muscle

Blood

Biosites: Blood Plasma

Insulin Release

Influenza Vaccine

Bacteriophage T4 Infection

Vascular Endothelial Growth Factor (VegF) Signaling

Respiratory Droplet

Last Universal Common Ancestor

Biosites: Basement Membrane

Measles Virus Proteins

HIV Vaccine

Zika Virus

Casein Micelle and Fat Globule in Milk

Biosites: Nucleus

Escherichia coli Bacterium

SARS-CoV-2 mRNA Vaccine

Collagen and Extracellular Matrix

HIV in Blood Plasma

Excitatory and Inhibitory Synapses

Red Blood Cell Cytoskeleton

Biosites: Cytoplasm

HIV-Infected Cell

Autophagy

SARS-CoV-2 Fusion

Caulobacter Polar Microdomain

Coronavirus

Ebola Virus

CytoSkeleton

Immunological Synapse

Abiogenesis

Lipid Droplets

Coronavirus Life Cycle