Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5673
Number of amino acids:120
Molecular Weight:11705.32 Da
Theoretical pI:9.12


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)2621.67%
Cysteine CYS (C)86.67%
Glutamic Acid GLU (E)10.83%
Aspartic Acid ASP (D)21.67%
Glycine GLY (G)108.33%
Phynylalanine PHE (F)00%
Isoleucine ILE (I)65%
Histidine HIS (H)00%
Lysine LYS (K)21.67%
Methionine MET (M)10.83%
Leucine LEU (L)75.83%
Asparagine ASN (N)75.83%
Glutamine GLN (Q)43.33%
Proline PRO (P)43.33%
Serine SER (S)1512.5%
Arginine ARG (R)75.83%
Threonine THR (T)86.67%
Tryptophan TRP (W)00%
Valine VAL (V)108.33%
Tyrosine TYR (Y)21.67%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC485
HydrogenH820
NitrogenN154
OxygenO163
SulphurS9

FormulaC485H820N154O163S9
Total Number of Atoms:1631


Total number of positively charged residues (ARG + LYS):9
Total number of negatively charged residues (ASP + GLU):3
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    3480
Absorption 0.1% (=1 g/l)    0.297,   assuming all pairs of CYS residues form cystines

Ext. coefficient    2980
Absorption 0.1% (=1 g/l)    0.255,   assuming all CYS residues are reduced
Aromaticity:0.017

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 32.20

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[20.83, 30.00, 29.17]

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:88.0833
Grand average of hydropathicity (GRAVY):0.38