This animation illustrates how a small molecule binds to a protein. As a result of the binding, the protein alters its shape and becomes inactivated.
The ribosome is a molecular factory that translates the genetic information in RNA into a string of amino acids that becomes a protein. Inside the ribosome, the genetic code of the RNA is read three letters at a time and compared with the corresponding code on a transfer molecule. When a match...
Cone snails have evolved many different toxins for different uses. Total molecular biodiversity may number in the millions.
Mutations in key genes can lay waste to the nervous system. By studying large families predisposed to developing these genetic disorders, scientists can identify the responsible altered gene.
To understand life's processes, perturb them. How a process responds to an insult can provide clues about normal function or mimic a specific disease state.
Scientists now have the ability to create millions of new molecules. How do they test whether any of these molecules are useful?
In four lectures, Nobel laureate Thomas R. Cech, PhD, discusses the ability of RNA to act as more than just an intermediary between DNA and proteins.
Discovery of RNA's catalytic activity led to unexpected spin-offs, including a new scenario for the origin of life.
The chromosome ends, or telomeres, are necessary for DNA stability and replication.
Topics include: Gene expression, RNA structure and function, transcription, RNA processing, translation, and post-translational events.
The drug Gleevec binds to and inactivates BCR-ABL, a mutant kinase that causes chronic myeloid leukemia.
Understanding that cancer is caused by mutations in genes that regulate cell proliferation has led to the development of targeted drug therapies.
A 3D model of BCR-ABL, an unregulated kinase that causes cancer.
A 3D model of gleevec-resistant BCR-ABL, a mutated form of BCR-ABL.
A 3D model of adenosine triphosphate, or ATP.
A 3D model of imatinib (Gleevec), a drug that mimics ATP and inhibits BCR-ABL.
A 3D model of dasatinib, a drug that can inhibit BCR-ABL and Gleevec-resistant BCR-ABL.
Learn about the structure and function of this fascinating cellular machine.
DNA is tightly packed in the nucleus of every cell. DNA wraps around special proteins called histones, which form loops of DNA called nucleosomes. These nucleosomes coil and stack together to form fibers called chromatin. Chromatin in turn forms larger loops and coils to form chromosomes.
Mutations in the BCR-ABL gene can cause resistance to Gleevec, but another drug, dasatinib, can be used instead.
Myosin II is one of the molecules involved in furrow formation in dividing cells. This animation shows how the molecule operates, and how furrowstatin blocks the mechanism and halts division of a cell.
The PPAR-delta receptor activates certain genes in a muscle cell, resulting in the burning of fat.
Protease inhibitors prevent maturation of viral proteins inside HIV particles.
Rapamycin is a small molecule originally isolated from nature. It has antibiotic and immunosuppressive properties. It also allows two proteins which do not normally interact to bind together in the cell, which causes problems in the nutrient-sensing pathway.
The dengue virus's outer envelope proteins form symmetrical units and overlay the lipid envelope, capsid, and the RNA genome.