Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5903
Number of amino acids:184
Molecular Weight:21246.4 Da
Theoretical pI:7.19


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)126.52%
Cysteine CYS (C)10.54%
Glutamic Acid GLU (E)105.43%
Aspartic Acid ASP (D)84.35%
Glycine GLY (G)126.52%
Phynylalanine PHE (F)73.8%
Isoleucine ILE (I)2111.41%
Histidine HIS (H)63.26%
Lysine LYS (K)84.35%
Methionine MET (M)63.26%
Leucine LEU (L)168.7%
Asparagine ASN (N)105.43%
Glutamine GLN (Q)42.17%
Proline PRO (P)105.43%
Serine SER (S)147.61%
Arginine ARG (R)105.43%
Threonine THR (T)84.35%
Tryptophan TRP (W)63.26%
Valine VAL (V)42.17%
Tyrosine TYR (Y)115.98%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC973
HydrogenH1478
NitrogenN254
OxygenO268
SulphurS7

FormulaC973H1478N254O268S7
Total Number of Atoms:2980


Total number of positively charged residues (ARG + LYS):18
Total number of negatively charged residues (ASP + GLU):18
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    49390
Absorption 0.1% (=1 g/l)    2.325,   assuming all pairs of CYS residues form cystines

Ext. coefficient    49390
Absorption 0.1% (=1 g/l)    2.325,   assuming all CYS residues are reduced
Aromaticity:0.130

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 36.74

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[35.33, 25.00, 23.91]

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:91.2498
Grand average of hydropathicity (GRAVY):-0.20