Skip to main content

30% Off New Releases: Explore the List

Harvard University Press - home
Gene Sharing and Evolution

Gene Sharing and Evolution

The Diversity of Protein Functions

Joram Piatigorsky

ISBN 9780674023413

Publication date: 02/28/2007

"Gene sharing" means that the different functions of a protein may share the same gene--that is, a protein produced by a gene evolved to fulfill a specialized function for one biological role may also perform alternate functions for other biological roles.

In the 1980s and early 1990s, Joram Piatigorsky and colleagues coined the term "gene sharing" to describe the use of multifunctional proteins as crystallins in the eye lens. In Gene Sharing and Evolution Piatigorsky explores the generality and implications of gene sharing throughout evolution and argues that most if not all proteins perform a variety of functions in the same and in different species, and that this is a fundamental necessity for evolution.

How is a gene identified, by its structure or its function? Do the boundaries of a gene include its regulatory elements? What is the influence of gene expression on natural selection of protein functions, and how is variation in gene expression selected in evolution? These are neither new nor resolved questions. Piatigorsky shows us that the extensiveness of gene sharing and protein multifunctionality offers a way of responding to these questions that sheds light on the complex interrelationships among genes, proteins, and evolution.


  • Every textbook of molecular evolution has a section on gene sharing but this is the first book entirely devoted to the topic. Piatigorsky considers almost all aspects of gene sharing, provides numerous examples, and discusses the importance and contribution of gene sharing to evolution. He argues forcefully that gene sharing is widespread in many genomes. His arguments will likely alter the prevailing view of gene sharing as a unique phenomenon to crystallins.

    —Jianzhi George Zhang, Associate Professor of Ecology and Evolutionary Biology at the University of Michigan


  • Joram Piatigorsky is a molecular biologist in Bethesda, Maryland.

Book Details

  • 336 pages
  • 6-1/8 x 9-1/4 inches
  • Harvard University Press