Molecule of the Month
May 2019

S-Nitrosylated Hemoglobin

Nitric oxide is attached to a conserved cysteine in hemoglobin and then released to control the flow of blood.


3D View:  1BUW




Health Focus: Antimicrobial Resistance

Antibiotics have saved countless lives, but pathogens are quickly finding ways to survive antibiotic treatment. Antibiotic-resistant bacteria are predicted to become the leading cause of death worldwide. They take many approaches: pumping antibiotics out of their cells, altering the molecular machinery that the antibiotics target, and attacking the antibiotics directly. Atomic structures publicly available in the PDB are revealing the details of drug resistance and providing new ways to combat it. Use the PDB-101 resources to learn about protein structures related to antibiotic action and resistance.

2019 Video Challenge for High School Students

Mechanisms of Bacterial Resistance to Aminoglycoside Antibiotics

Many thanks to all challenge participants, expert judges, teachers, parents, and voters who made this exciting competition happen.

Congratulations to the 2019 Winners!

Winner, First Place

Mira Mesa High School,
San Diego, CA

Winner, Second

The Quarry Lane School,
Dublin, CA

Winner, Third

Stuyvesant High School,
New York, NY

Winner, Viewers Choice

Rye Country Day School,
Rye, NY

Learn: Materials for Exploration
Learn about the relationship between protein structure and function.
Teach: Curricula
The RCSB PDB Curricula provide authentic, hands-on teaching materials, individual and group activities and assessment suggestions.
Education Corner: Using PDB Resources
Exploring the Molecules of Biological Warfare in Virtual Reality By Steve McCloskey, Nanome Inc.
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 ( All rights reserved.

Transfer Ribonucleic Acid (tRNA)

Induced Lac Repressor


Cytochrome c (unbound)



Intermolecular Contacts in Hemoglobin S


Aspartate Transcarbamoylase (ATCase)

Cytochrome c


Immunoglobulin G (IgG)


TATA-Binding Protein (TBP)


Myoglobin Fold

Hemoglobin S

Tomato Bushy Stunt Virus (TBSV)

Deoxyribonucleic Acid (DNA)




DPG-Hemoglobin Complex

Ribonuclease S


Lac Repressor





Carboxypeptidase A

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: Muscle

Ebola Virus

Biosites: Blood Plasma

Mycoplasma mycoides

Biosites: Red Blood Cell


HIV in Blood Plasma

Biosites: Basement Membrane

Biosites: Nucleus

Zika Virus

Escherichia coli

Biosites: Cytoplasm

Insulin Action


Excitatory and Inhibitory Synapses

Measles Virus Proteins