ABL (gene)

Overview

The ABL gene, also known as ABL1, is a gene that encodes a protein known as the Abelson murine leukemia viral oncogene homolog 1. This protein is a tyrosine kinase that plays a crucial role in various cellular processes, including cell division, adhesion, and stress response. The ABL gene is located on chromosome 9 in humans.

Structure

The ABL protein consists of several domains that contribute to its function. These include the SH3 domain, SH2 domain, and the tyrosine kinase domain. The structure of the ABL protein allows it to interact with various cellular components and regulate multiple signaling pathways.

Function

The primary function of the ABL protein is to regulate cell growth and division. It is involved in the signal transduction pathways that control the cell cycle. ABL also plays a role in the cellular response to DNA damage and oxidative stress.

Clinical Significance

The ABL gene is of significant interest in oncology due to its role in the development of certain types of cancer. A well-known example is the Philadelphia chromosome, which results from a translocation between chromosome 9 and chromosome 22, creating the BCR-ABL fusion protein. This fusion protein is a constitutively active tyrosine kinase that leads to uncontrolled cell proliferation, commonly associated with chronic myeloid leukemia (CML).

Crystal structure of Abl1 bound to Nilotinib

Inhibitors

Several tyrosine kinase inhibitors (TKIs) have been developed to target the BCR-ABL fusion protein in CML. These include drugs such as Imatinib, Dasatinib, and Nilotinib. These inhibitors bind to the ATP-binding site of the ABL kinase domain, preventing its activity and thereby inhibiting cancer cell growth.

Research

Ongoing research is focused on understanding the mechanisms of resistance to ABL inhibitors and developing new therapeutic strategies. Studies are also exploring the role of ABL in other diseases and its potential as a target for novel treatments.

Related pages

• Tyrosine kinase
• Chronic myeloid leukemia
• Philadelphia chromosome
• Signal transduction