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Jens Christian Skou

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Jens Christian Skou
Skou in 2008
Born(1918-10-08)8 October 1918
Lemvig, Denmark
Died28 May 2018(2018-05-28) (aged 99)
Risskov, Aarhus, Denmark
NationalityDanish
Alma materUniversity of Copenhagen
Known forNa+,K+-ATPase
AwardsNobel Prize in Chemistry (1997)
Fernström Prize (1985)
Scientific career
FieldsPhysiology, Biophysics, Biochemistry
InstitutionsAarhus University

Jens Christian Skou (Danish pronunciation: [ˈjens ˈkʰʁestjæn ˈskʌwˀ]; 8 October 1918 – 28 May 2018) was a Danish biochemist and Nobel laureate.[1]

Early life

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Skou was born in Lemvig, Denmark to a wealthy family. His father Magnus Martinus Skou was a timber and coal merchant. His mother Ane-Margrethe Skou took over the company after the death of his father. At the age of 15, Skou entered a boarding school in Haslev, Zealand. He graduated in medicine from the University of Copenhagen in 1944 and received his doctorate in 1954. He began working at the Aarhus University in 1947 and was appointed professor of biophysics in 1977. He retired from the Aarhus University in 1988, but kept offices at the Department of Physiology (today part of the Department of Biomedicine).

Career

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In 1997 he received the Nobel Prize in Chemistry (together with Paul D. Boyer and John E. Walker) for his discovery of Na+,K+-ATPase,[2] making him, at the time of his death, the latest Danish Nobel laureate and the first at Aarhus University.

Skou had taken a few years away from his clinical training in the early 1950s to study the action of local anaesthetics. He had discovered that a substance’s anaesthetic action was related to its ability to dissolve in a layer of the lipid part of the plasma membrane, the anaesthetic molecules affected the opening of sodium channels which he assumed to be protein. This, he argued, would affect the movement of sodium ions and make nerve cells inexcitable, thus causing anaesthesia.

Skou thought that other types of membrane protein might also be affected by local anaesthetics dissolving in the lipid part of the membrane. He therefore had the idea of looking at an enzyme which was embedded in the membrane and finding out if its properties were affected by local anaesthetics. He looked at ATPase in crab nerves.

The enzyme was there, but its activity was very variable and he needed a highly active enzyme for his studies. Eventually he managed to discover that ATPase was most active when exposed to the right combination of sodium, potassium and magnesium ions. Only then did he realise that this enzyme might have something to do with the active movement of sodium and potassium across the plasma membrane. This idea had been postulated many years before, however, the mechanism was quite unknown.

Skou published his findings.[3] However, in his paper he was wary of identifying the enzyme with the active ion movement, so he left out the term “sodium-potassium pump” from the title of his paper. Indeed, he seems to have realised the importance of his discovery only gradually, and he continued his studies on local anaesthetics.

In 1958 Skou went to a conference in Vienna to describe his work on cholinesterase. There he met Robert Post (born 1920[4]), who had been studying the pumping of sodium and potassium in red blood cells. Post had recently discovered that three sodium ions were pumped out of the cell for every two potassium ions pumped in, and in his research he had made use of a substance called ouabain (or g-strophanthin) which had recently been shown to inhibit the pump[5]).

Post had not read Skou’s paper, but he was excited when Skou told him about his work with ATPase. Post asked whether the enzyme was inhibited by ouabain. At this stage Skou was unaware that ouabain inhibited the pump, but he immediately telephoned his lab and arranged for the experiment to be done. Ouabain did indeed inhibit the enzyme, thus establishing a link between the enzyme and the sodium-potassium pump.[6]

Following the Nobel Prize, Skou gave several interviews recounting the story of his discoveries, and at age 94 was reported to still keep up with publications in his field.[7][8] He died on 28 May 2018 in Aarhus, Denmark at the age of 99, less than five months shy of his 100th birthday.[9][10][11]

References

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  1. ^ Stevnhøj, Henriette (29 May 2018). "Nobelpristager, læge og fysiolog Jens Christian Skou er død 99 år". newsroom.au.dk (in Danish). Retrieved 29 May 2018.
  2. ^ "The Nobel Prize in Chemistry 1997". nobelprize.org. Retrieved 29 May 2018.
  3. ^ Skou, JC (23 February 1957). "The influence of some cations on an adenosine triphosphatase from peripheral nerves". Biochimica et Biophysica Acta. 23 (2): 394–401. doi:10.1016/0006-3002(57)90343-8. PMID 13412736. S2CID 32516710.
  4. ^ Kresge, Nicole; Simoni, Robert D.; Hill, Robert L. (13 January 2006). "Na,K-ATPase and the Post-Albers Cycle: the Work of Robert L. Post". Journal of Biological Chemistry. 281 (2): e2. doi:10.1016/S0021-9258(19)47575-3. Retrieved 29 May 2018 – via www.jbc.org.
  5. ^ Post, RL; Merritt, CR; Kinsolving, CR; Albright, CD (June 1960). "Membrane adenosine triphosphatase as a participant in the active transport of sodium and potassium in the human erythrocyte". Journal of Biological Chemistry. 235 (6): 1796–1802. doi:10.1016/S0021-9258(19)76884-7. PMID 14434402.
  6. ^ Skou, JC (9 April 1962). "Preparation from mammalian brain and kidney of the enzyme system involved in active transport of Na ions and K ions". Biochimica et Biophysica Acta. 58: 314–325. doi:10.1016/0006-3002(62)91015-6. PMID 13913700.
  7. ^ "Held og tilfældighed førte Jens Christian Skou til Nobelprisen". videnskab.dk. 22 March 2017. Retrieved 29 May 2018.
  8. ^ "Professor livet ud". stiften.dk. 7 July 2013. Retrieved 29 May 2018.
  9. ^ Stevnhøj, Henriette (29 May 2018). "Nobel Laureate, medical doctor and physiologist Jens Christian Skou has died". newsroom.au.dk.
  10. ^ Uriy (29 May 2018). "In Denmark died Nobel prize in chemistry". 24-my.info. Retrieved 3 August 2019.
  11. ^ "Dansk nobelprismodtager i kemi er død – 99 år". www.fyens.dk (in Danish). 29 May 2018.
[edit]
  • Jens Christian Skou on Nobelprize.org Edit this at Wikidata including the Nobel Lecture on "The Identification of the Sodium-Potassium Pump"
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