Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5789
Number of amino acids:209
Molecular Weight:21856.29 Da
Theoretical pI:6.44


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)2110.05%
Cysteine CYS (C)20.96%
Glutamic Acid GLU (E)20.96%
Aspartic Acid ASP (D)115.26%
Glycine GLY (G)2210.53%
Phynylalanine PHE (F)188.61%
Isoleucine ILE (I)146.7%
Histidine HIS (H)41.91%
Lysine LYS (K)115.26%
Methionine MET (M)10.48%
Leucine LEU (L)2210.53%
Asparagine ASN (N)83.83%
Glutamine GLN (Q)83.83%
Proline PRO (P)167.66%
Serine SER (S)125.74%
Arginine ARG (R)10.48%
Threonine THR (T)157.18%
Tryptophan TRP (W)00%
Valine VAL (V)178.13%
Tyrosine TYR (Y)41.91%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1015
HydrogenH1569
NitrogenN247
OxygenO283
SulphurS3

FormulaC1015H1569N247O283S3
Total Number of Atoms:3117


Total number of positively charged residues (ARG + LYS):12
Total number of negatively charged residues (ASP + GLU):13
Extinction Coefficient:This protein does not contain any Tryptophan residues. Experience shows that this could result in more than 10% error in the computed extinction coefficient.

Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    6085
Absorption 0.1% (=1 g/l)    0.278,   assuming all pairs of CYS residues form cystines

Ext. coefficient    5960
Absorption 0.1% (=1 g/l)    0.273,   assuming all CYS residues are reduced
Aromaticity:0.105

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 21.24

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[35.89, 27.75, 22.01]

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:100.813
Grand average of hydropathicity (GRAVY):0.44