Physicochemical Properties of Peptide



PPepDB ID:PPepDB_1314
Number of amino acids:210
Molecular Weight:22753.63 Da
Theoretical pI:8.24


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)188.57%
Cysteine CYS (C)125.71%
Glutamic Acid GLU (E)10.48%
Aspartic Acid ASP (D)94.29%
Glycine GLY (G)2411.43%
Phynylalanine PHE (F)136.19%
Isoleucine ILE (I)52.38%
Histidine HIS (H)20.95%
Lysine LYS (K)52.38%
Methionine MET (M)52.38%
Leucine LEU (L)146.67%
Asparagine ASN (N)209.52%
Glutamine GLN (Q)73.33%
Proline PRO (P)178.1%
Serine SER (S)115.24%
Arginine ARG (R)83.81%
Threonine THR (T)157.14%
Tryptophan TRP (W)41.9%
Valine VAL (V)83.81%
Tyrosine TYR (Y)125.71%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1010
HydrogenH1492
NitrogenN274
OxygenO296
SulphurS17

FormulaC1010H1492N274O296S17
Total Number of Atoms:3089


Total number of positively charged residues (ARG + LYS):13
Total number of negatively charged residues (ASP + GLU):10
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    40630
Absorption 0.1% (=1 g/l)    1.786,   assuming all pairs of CYS residues form cystines

Ext. coefficient    39880
Absorption 0.1% (=1 g/l)    1.753,   assuming all CYS residues are reduced
Aromaticity:0.138

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 17.89

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[26.67, 34.29, 18.10]

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:54.9048
Grand average of hydropathicity (GRAVY):-0.23