In this biography
Quick facts
- Born
- 1905
- Died
- 1993
- Birthplace
- Luarca, Spain
- Country
- United States
- Nationality
- Not independently established
- Known for
- Discovery of polynucleotide phosphorylase with Marianne Grunberg-Manago and investigation of enzymatic RNA synthesis
Why this life matters
Describing the achievement precisely preserves its significance: making RNA chains in a test tube was an important result, while establishing how sequence information is copied in living systems required further evidence and different questions.
Timeline
Key moments
Birth
Born in Luarca, Spain.
Nobel recognition
Received the Nobel Prize in Physiology or Medicine.
A Spanish medical education and an international career
Severo Ochoa was born in Luarca, Spain, in 1905. He studied medicine in Madrid and worked with Otto Meyerhof in Heidelberg before an international research career that eventually brought him to New York University. His award-era biography records successive appointments in medicine, biochemistry and pharmacology there. He became an American citizen in 1956. His research interests extended across energy transfer and metabolism before the nucleic-acid work for which he shared the 1959 medicine prize with Arthur Kornberg.
An enzyme links building and breaking an RNA chain
Ochoa and Marianne Grunberg-Manago discovered polynucleotide phosphorylase through experiments involving phosphate exchange. His 1959 lecture describes a reversible reaction: the enzyme can build polyribonucleotide chains from nucleoside diphosphates or break them down through phosphorolysis. The synthetic direction made artificial RNA-like polymers available for investigation. The work also raised a mechanistic question about how a chain begins and grows. A primer can supply an initial end for extension without necessarily serving as a sequence pattern to be copied.
Sources for this section: [3]
A biochemical capability with a carefully stated meaning
Ochoa's contribution helped make nucleic-acid synthesis an experimentally tractable chemical process. His lecture credited collaborators and distinguished observed priming effects from unresolved explanations. It explicitly noted that the possibility of a polyribonucleotide acting as a template for its own replication had not been established in those experiments. Ochoa died in Madrid in 1993. Describing the achievement precisely preserves its significance: making RNA chains in a test tube was an important result, while establishing how sequence information is copied in living systems required further evidence and different questions.
Quick answers
Frequently asked questions about Severo Ochoa
- What is Severo Ochoa known for?
- Discovery of polynucleotide phosphorylase with Marianne Grunberg-Manago and investigation of enzymatic RNA synthesis.
Keep exploring
Lives connected to this story
- Arthur Kornberg
Compare the related experimental question and research career.
- Carol W. Greider
Compare the related experimental question and research career.
Sources and further reading
Explore the evidence
These references support the biography and offer further reading. Official records, first-person accounts and independent reporting provide different perspectives; image records document attribution and licensing.
- 1. Nobel Prize OutreachSevero Ochoa โ Facts
Source scope: Birth/death and award metadata; short official work summary.
- 2. Nobel FoundationSevero Ochoa โ Biographical
Source scope: Selected historical passages, as recorded in the research evidence ledger; not a full-document reading claim.
- 3. Nobel FoundationSevero Ochoa โ Nobel lecture
Source scope: Selected historical passages, as recorded in the research evidence ledger; not a full-document reading claim.
