Johann Deisenhofer (; born September 30, 1943) is a German biochemist who, along with Hartmut Michel and

Robert Huber Robert Huber (; born 20 February 1937) is a German biochemist and Nobel laureate. known for his work crystallizing an intramembrane protein important in photosynthesis and subsequently applying X-ray crystallography to elucidate the protein's st ...

, received the

Nobel Prize for Chemistry ) , image = Nobel Prize.png , alt = A golden medallion with an embossed image of a bearded man facing left in profile. To the left of the man is the text "ALFR•" then "NOBEL", and on the right, the text (smaller) "NAT•" then "M ...

in 1988 for their determination of the first crystal structure of an

integral membrane protein An integral, or intrinsic, membrane protein (IMP) is a type of membrane protein that is permanently attached to the biological membrane. All ''transmembrane proteins'' are IMPs, but not all IMPs are transmembrane proteins. IMPs comprise a sign ...

, a membrane-bound complex of proteins and co-factors that is essential to

photosynthesis Photosynthesis is a process used by plants and other organisms to convert light energy into chemical energy that, through cellular respiration, can later be released to fuel the organism's activities. Some of this chemical energy is stored i ...

Early life and education

Born in Bavaria, Deisenhofer earned his doctorate from the

Technical University of Munich The Technical University of Munich (TUM or TU Munich; german: Technische Universität München) is a public research university in Munich, Germany. It specializes in engineering, technology, medicine, and applied and natural sciences. Establis ...

for research work done at the

Max Planck Institute of Biochemistry The Max Planck Institute of Biochemistry (MPIB) is a research institute of the Max Planck Society located in Martinsried, a suburb of Munich. The institute was founded in 1973 by the merger of three formerly independent institutes: the Max Planck ...

Martinsried Martinsried is one of Munich's two science suburbs. It is a section of Planegg municipality in the district of Munich in Bavaria, Germany. Martinsried is best known as the location of the Max Planck Institute of Biochemistry, the Max Planck ...

West Germany West Germany is the colloquial term used to indicate the Federal Republic of Germany (FRG; german: Bundesrepublik Deutschland , BRD) between its formation on 23 May 1949 and the German reunification through the accession of East Germany on 3 O ...

, in 1974. He conducted research there until 1988, when he joined the scientific staff of the Howard Hughes Medical Institute and the faculty of the Department of

Biochemistry Biochemistry or biological chemistry is the study of chemical processes within and relating to living organisms. A sub-discipline of both chemistry and biology, biochemistry may be divided into three fields: structural biology, enzymology and ...

at The

University of Texas Southwestern Medical Center at Dallas The University of Texas Southwestern Medical Center (UT Southwestern or UTSW) is a public academic health science center in Dallas, Texas. With approximately 18,800 employees, more than 2,900 full-time faculty, and nearly 4 million outpatient vi ...

Career

Together with Michel and Huber, Deisenhofer determined the three-dimensional structure of a

protein complex A protein complex or multiprotein complex is a group of two or more associated polypeptide chains. Protein complexes are distinct from multienzyme complexes, in which multiple catalytic domains are found in a single polypeptide chain. Protein ...

found in certain photosynthetic bacteria. This membrane protein complex, called a

photosynthetic reaction center A photosynthetic reaction center is a complex of several proteins, pigments and other co-factors that together execute the primary energy conversion reactions of photosynthesis. Molecular excitations, either originating directly from sunlight or t ...

, was known to play a crucial role in initiating a simple type of photosynthesis. Between 1982 and 1985, the three scientists used

X-ray crystallography X-ray crystallography is the experimental science determining the atomic and molecular structure of a crystal, in which the crystalline structure causes a beam of incident X-rays to diffract into many specific directions. By measuring the angles ...

to determine the exact arrangement of the more than 10,000 atoms that make up the protein complex. Their research increased the general understanding of the mechanisms of photosynthesis and revealed similarities between the photosynthetic processes of plants and bacteria. Deisenhofer currently serves on the board of advisors of Scientists and Engineers for America, an organization focused on promoting sound science in American government. In 2003 he was one of 22 Nobel Laureates who signed the

Humanist Manifesto ''Humanist Manifesto'' is the title of three manifestos laying out a humanist worldview. They are the original '' Humanist Manifesto'' (1933, often referred to as Humanist Manifesto I), the ''Humanist Manifesto II'' (1973), and ''Humanism and I ...

. He is currently a professor at the Department of

Biophysics Biophysics is an interdisciplinary science that applies approaches and methods traditionally used in physics to study biological phenomena. Biophysics covers all scales of biological organization, from molecular to organismic and populations. ...

at the

University of Texas Southwestern Medical Center The University of Texas Southwestern Medical Center (UT Southwestern or UTSW) is a public academic health science center in Dallas, Texas. With approximately 18,800 employees, more than 2,900 full-time faculty, and nearly 4 million outpatient vi ...

References

External links

* {{DEFAULTSORT:Deisenhofer, Johann 1943 births German biochemists German biophysicists German Nobel laureates Howard Hughes Medical Investigators Living people Max Planck Society people Members of the United States National Academy of Sciences Nobel laureates in Chemistry Technical University of Munich alumni University of Texas Southwestern Medical Center faculty Knights Commander of the Order of Merit of the Federal Republic of Germany Researchers of photosynthesis