Proline

see also: Etymology of Proline

The proline is one of the 20 amino-acid of the genetic Code. Its abbreviations are Pro and P. Within human proteins, its frequency is of 5,2%.

The L proline is one of the twenty amino-acids of which the living organisms are useful themselves to assemble proteins. One speaks amino-acids thus proteinogenes . The proline can act by breaking the propellers α because it cannot form hydrogen bond (because of its secondary amine) and thus destabilizes the propeller alpha, or form a junction in the layers β. The presence of many prolines can be at the origin of a propeller with proline (it is in particular the case of collagen). The proline has a cyclic grouping secondary amine and not imine as indicates it certain works the grouping imine is characterized by a double connection carbon/nitrogenizes it is not the case here.

Data

Force of van der Waals: 90
pK1 (α-COOH): 1.95
pK2 (αN-H): 10.64

Proline, or Pro or, is a nonpolar amino-acid characterized by a cycle pyrolidine. It should be noted that the proline contains in its molecule a cyclic function secondary amine

Another amino-acid Hydroxyproline derives from the proline by Hydroxylation into 4.

External bonds

http://www.chups.jussieu.fr/polys/biochimie/STbioch/POLY.Chp.11.15.html
http://www.chemie.fu-berlin.de/chemistry/bio/aminoacid/prolin_en.html

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