Central dogma of molecular biology

Central dogma of molecular biology
Name	Central dogma of molecular biology
Caption	DNA double helix model
Field	Molecular biology
Discovered	1958
Discoverer	Francis Crick

Contents

Central dogma of molecular biology The central dogma of molecular biology describes the directional flow of genetic information within biological systems, summarizing how hereditary information is transferred from sequence-encoding polymers to functional products. Originating in the mid-20th century, the concept has guided research linking Francis Crick, James Watson, Rosalind Franklin, Maurice Wilkins, and laboratories at the Cavendish Laboratory, King's College London, and Laboratory of Molecular Biology. It underpins modern work in institutions such as the National Institutes of Health, Cold Spring Harbor Laboratory, and Max Planck Society.

Overview

The central dogma asserts a directional pathway in which information flows from DNA to RNA to Protein, a formulation articulated by Francis Crick and influenced by discoveries from Oswald Avery, Alfred Hershey, and Martha Chase. This framework connects structural models like the double helix proposed by James Watson and Francis Crick with biochemical processes elucidated in studies at University of Cambridge, Rockefeller University, and the European Molecular Biology Laboratory. It distinguishes informational polymers (nucleic acids) from functional polymers (proteins), providing context for techniques developed at centers such as Cold Spring Harbor Laboratory, Max Planck Institute for Molecular Genetics, and the Wellcome Trust Sanger Institute.

Early conceptual roots trace to experiments by Oswald Avery at the Rockefeller Institute, and to phage genetics work by Alfred Hershey and Martha Chase at the Cold Spring Harbor Laboratory. The structural breakthrough by James Watson and Francis Crick—based on data from Rosalind Franklin and Maurice Wilkins at King's College London—framed how sequence encodes function. The term "central dogma" was coined by Francis Crick in a 1958 lecture and elaborated in papers at the Cavendish Laboratory and in correspondence with contemporaries at Massachusetts Institute of Technology and California Institute of Technology. Subsequent milestones included the genetic code deciphering by groups led by Marshall Nirenberg, Har Gobind Khorana, and Robert W. Holley, and recombinant DNA advances at Stanford University, University of California, San Francisco, and the National Institutes of Health.

DNA replication, driven by polymerases characterized at institutions such as the Salk Institute and Max Planck Institute, ensures transmission of sequence across cell divisions; key proteins like DNA polymerase I were identified in studies at the University of Geneva and Stanford University. Transcription by RNA polymerase—elucidated in work from Cold Spring Harbor Laboratory and Princeton University—copies DNA sequence into messenger RNA; transcription factors characterized by laboratories at the Whitehead Institute and Harvard Medical School regulate promoter recognition. Translation of mRNA into polypeptide chains occurs at the ribosome, whose structure was solved in cryo-EM and crystallography studies led by researchers at the European Molecular Biology Laboratory, MRC Laboratory of Molecular Biology, and Max Planck Society; the Nobel Prize in Chemistry recognized work by scientists from these centers. The genetic code, defined through experiments at the National Institutes of Health and the University of Wisconsin–Madison, maps codons to amino acids and is conserved across domains studied by teams at the American Museum of Natural History and Smithsonian Institution.

Discoveries of reverse information flow expanded the original dogma: reverse transcriptase was discovered in retrovirus research by teams including Howard Temin and David Baltimore, associated with the National Cancer Institute and Massachusetts Institute of Technology. RNA viruses replicate information as shown in studies at the Pasteur Institute and Institut Pasteur, and RNA-based regulation via microRNA and siRNA was illuminated in labs at Cold Spring Harbor Laboratory and Whitehead Institute. Protein-only infectious agents, or prions, were proposed by Stanley B. Prusiner and investigated at centers like the University of California, San Francisco and National Institutes of Health, challenging strict sequence-based paradigms. Synthetic biology efforts at MIT and Harvard University further extend the dogma by engineering novel information flows and noncanonical amino acid incorporation.

Foundational experiments include the transformation experiments by Oswald Avery at the Rockefeller Institute, the Hershey–Chase experiment conducted by Alfred Hershey and Martha Chase at Cold Spring Harbor Laboratory, and the DNA structural work of Watson and Crick at the Cavendish Laboratory. Deciphering the genetic code involved work by Marshall Nirenberg at the National Institutes of Health and Har Gobind Khorana at the University of Wisconsin–Madison. Reverse transcription was validated in studies by Howard Temin at Vanderbilt University and David Baltimore at MIT, while ribosome structural determination was achieved by groups at the MRC Laboratory of Molecular Biology and European Molecular Biology Laboratory. Recombinant DNA techniques developed at Stanford University and University of California, San Francisco provided tools to manipulate information flow and demonstrate expression of foreign genes in host organisms.

The central dogma frames genetic engineering, vaccine development, and therapeutic strategies pursued at institutions such as Pfizer, Moderna, National Institutes of Health, and Gates Foundation-funded initiatives. Understanding transcriptional and translational control informs cancer research at Dana-Farber Cancer Institute and Memorial Sloan Kettering Cancer Center, and guides antiviral strategies developed at Centers for Disease Control and Prevention and World Health Organization collaborations. Synthetic biology and gene-editing technologies, including work from Broad Institute, Caribou Biosciences, and University of California, Berkeley, rely on the dogma to reprogram organisms for biomanufacturing, agriculture, and medicine. The concept also shapes regulatory and ethical discussions in forums like the National Academy of Sciences and the World Health Organization.