The B. anthracis Picture Is Now Complete

After a three-year effort, scientists have determined the crystal structure of edema factor, a toxic protein secreted by Bacillus anthracis, the bacteria that causes anthrax.1 Edema factor (EF) works in concert with two other anthrax proteins—protective antigen (PA) and lethal factor (LF)—to kill its host cell. PA's crystal structure was reported in 19972 and LF's in November 2001.3 With this three-dimensional map now in hand, researchers are making headway into understanding how the

Written byLeslie Pray
| 4 min read

Register for free to listen to this article
Listen with Speechify
0:00
4:00
Share

Drugs that target the toxic proteins would be a big boost for treatment against anthrax since antibiotics are not always an effective antidote. Even though most B. anthracis strains are susceptible to antibiotics, there is a certain point during the course of infection, after which so much toxic protein has accumulated, that no amount of antibiotic does any good. But if an arsenal of antitoxins existed that could be administered at this later stage of infection, such drugs could be used to "cure those unfortunate patients," according to Wei-Jen Tang, a professor at the University of Chicago's Ben-May Institute for Cancer Research and coauthor on the recent Nature paper.1 Tang says he suspects that antitoxins could have saved the lives recently lost from inhalation anthrax.

EF is one of several adenylyl cyclases, molecules that convert ATP into cyclic AMP (cAMP). Cyclic AMP exists in almost every organism outside of plants, ...

Interested in reading more?

Become a Member of

The Scientist Logo
Receive full access to digital editions of The Scientist, as well as TS Digest, feature stories, more than 35 years of archives, and much more!
Already a member? Login Here

Meet the Author

Published In

Share
February 2026

A Stubborn Gene, a Failed Experiment, and a New Path

When experiments refuse to cooperate, you try again and again. For Rafael Najmanovich, the setbacks ultimately pushed him in a new direction.

View this Issue
Human-Relevant In Vitro Models Enable Predictive Drug Discovery

Advancing Drug Discovery with Complex Human In Vitro Models

Stemcell Technologies
Redefining Immunology Through Advanced Technologies

Redefining Immunology Through Advanced Technologies

Ensuring Regulatory Compliance in AAV Manufacturing with Analytical Ultracentrifugation

Ensuring Regulatory Compliance in AAV Manufacturing with Analytical Ultracentrifugation

Beckman Coulter Logo
Conceptual multicolored vector image of cancer research, depicting various biomedical approaches to cancer therapy

Maximizing Cancer Research Model Systems

bioxcell

Products

Sino Biological Logo

Sino Biological Pioneers Life Sciences Innovation with High-Quality Bioreagents on Inside Business Today with Bill and Guiliana Rancic

Sino Biological Logo

Sino Biological Expands Research Reagent Portfolio to Support Global Nipah Virus Vaccine and Diagnostic Development

Beckman Coulter

Beckman Coulter Life Sciences Partners with Automata to Accelerate AI-Ready Laboratory Automation

Refeyn logo

Refeyn named in the Sunday Times 100 Tech list of the UK’s fastest-growing technology companies