Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5119
Number of amino acids:336
Molecular Weight:37977.66 Da
Theoretical pI:5.28


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)205.95%
Cysteine CYS (C)82.38%
Glutamic Acid GLU (E)236.85%
Aspartic Acid ASP (D)216.25%
Glycine GLY (G)205.95%
Phynylalanine PHE (F)205.95%
Isoleucine ILE (I)247.14%
Histidine HIS (H)72.08%
Lysine LYS (K)175.06%
Methionine MET (M)61.79%
Leucine LEU (L)4212.5%
Asparagine ASN (N)175.06%
Glutamine GLN (Q)133.87%
Proline PRO (P)113.27%
Serine SER (S)257.44%
Arginine ARG (R)175.06%
Threonine THR (T)102.98%
Tryptophan TRP (W)41.19%
Valine VAL (V)236.85%
Tyrosine TYR (Y)82.38%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1709
HydrogenH2682
NitrogenN452
OxygenO498
SulphurS14

FormulaC1709H2682N452O498S14
Total Number of Atoms:5355


Total number of positively charged residues (ARG + LYS):34
Total number of negatively charged residues (ASP + GLU):44
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    34420
Absorption 0.1% (=1 g/l)    0.906,   assuming all pairs of CYS residues form cystines

Ext. coefficient    33920
Absorption 0.1% (=1 g/l)    0.893,   assuming all CYS residues are reduced
Aromaticity:0.095

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 50.01

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[36.01, 21.73, 27.08]

Amino acids in helix: V, I, Y, F, W, L || Amino acids in turn: N, P, G, S || Amino acids in sheet: E, M, A, L
Aliphatic index:102.411
Grand average of hydropathicity (GRAVY):-0.01