Primary structure of proteins

Reggie Aurora reggie at grserv.med.jhu.edu
Tue Sep 10 14:58:20 EST 1996


> In article <32281FA9.484D at chem.ut.ee>, Andres Kreegipuu <andres at chem.ut.ee> writes:
>Hi,
>
>I am looking for information about the average occurence frecuency of
>the 20 natural amino acids in proteins. Are these data available
>anywhere?
>
>Andres Kreegipuu

    Andres - Here is the freq. of 20 aa from March 1995 PDB using 
non-homologous proteins (<25% homology):

(PDB is the Brookhaven structure database, just in case you didn't know)



Total number of aa counted:    200995

      Residue   Counts  %age
-----------------------------------
  1     G       16812   8.36
  2     A       17288   8.60
  3     V       14591   7.26
  4     I       10526   5.24
  5     L       16290   8.10
  6     F        7494   3.73
  7     P        8966   4.46
  8     M        3744   1.86
  9     W        2919   1.45
 10     C        4137   2.06
 11     S       15075   7.50
 12     T       12900   6.42
 13     N       10007   4.98
 14     Q        7248   3.61
 15     Y        7069   3.52
 16     H        4629   2.30
 17     D       11221   5.58
 18     E       10248   5.10
 19     K       11802   5.87
 20     R        8029   3.99

		 ---------------- **** ----------------
			     Reggie Aurora
     Dept of Biophysics, WBSB 701, Johns Hopkins School of Medicine
		 725 N. Wolfe St., Baltimore, MD 21205



More information about the Proteins mailing list