Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5778
Number of amino acids:207
Molecular Weight:22773.92 Da
Theoretical pI:5.89


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)136.28%
Cysteine CYS (C)41.93%
Glutamic Acid GLU (E)146.76%
Aspartic Acid ASP (D)104.83%
Glycine GLY (G)136.28%
Phynylalanine PHE (F)73.38%
Isoleucine ILE (I)115.31%
Histidine HIS (H)83.86%
Lysine LYS (K)125.8%
Methionine MET (M)10.48%
Leucine LEU (L)2411.59%
Asparagine ASN (N)94.35%
Glutamine GLN (Q)62.9%
Proline PRO (P)146.76%
Serine SER (S)209.66%
Arginine ARG (R)73.38%
Threonine THR (T)104.83%
Tryptophan TRP (W)31.45%
Valine VAL (V)167.73%
Tyrosine TYR (Y)52.42%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1021
HydrogenH1604
NitrogenN274
OxygenO306
SulphurS5

FormulaC1021H1604N274O306S5
Total Number of Atoms:3210


Total number of positively charged residues (ARG + LYS):19
Total number of negatively charged residues (ASP + GLU):24
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    24200
Absorption 0.1% (=1 g/l)    1.063,   assuming all pairs of CYS residues form cystines

Ext. coefficient    23950
Absorption 0.1% (=1 g/l)    1.052,   assuming all CYS residues are reduced
Aromaticity:0.072

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 40.88

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[31.88, 27.05, 25.12]

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:94.6377
Grand average of hydropathicity (GRAVY):-0.18