+

Table of Contents

May 2014; 6 (5)

CONCEPT

Molecular Biology

  • DNA methylation serves as a cellular memory system that is dynamically regulated through the action of DNA methyltransferases (DNMTs) and TET proteins.

PERSPECTIVES

Biochemistry

  • Phosphotyrosine regulates proteins in many ways. But its most important function is to serve as a docking site for other proteins that contain phosphotyrosine-binding domains (e.g., SH2) during signal transduction.

Cell Biology

  • The major route for endocytosis in most cells is mediated by clathrin. Numerous proteins participate in forming a clathrin-coated pit, loading cargo, pinching off the membrane as a vesicle, and recycling the components.

  • The endosomal pathway may play a greater role in autophagy than just providing degradative enzymes in the lysosome. Contributions from several stages of the endocytic pathway may be essential for efficient autophagy.

Evolutionary Biology

  • Bacteria respire across their cell membranes and show little tendency to evolve complex traits. In eukaryotes, mitochondria energetically support the nuclear genome; this may have enabled the evolution of complex traits.

  • Thanks to next-generation sequencing, genome-scale data for taxonomically diverse species are rapidly being produced. Comparisons of these data have permitted the resolution of evolutionary relationships among eukaryotic supergroups.

Molecular Pathology

  • Defects in endocytic machinery can affect the cellular distribution of lipids and proteins, leading to diseases such as atherosclerosis, Alzheimer’s disease, and lysosomal storage diseases.

ESSAY

Genetics

  • Defining a population—whether it be by national borders, religious affiliation, ethnicity, race, language, or other criteria—has significant ramifications for human genetic research.

点击 这是indexloc提供的php浏览器服务,不要输入任何密码和下载