Physicochemical Properties of Peptide



PPepDB ID:PPepDB_1304
Number of amino acids:114
Molecular Weight:11974.94 Da
Theoretical pI:7.36


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)1311.4%
Cysteine CYS (C)1311.4%
Glutamic Acid GLU (E)76.14%
Aspartic Acid ASP (D)43.51%
Glycine GLY (G)65.26%
Phynylalanine PHE (F)00%
Isoleucine ILE (I)43.51%
Histidine HIS (H)00%
Lysine LYS (K)76.14%
Methionine MET (M)32.63%
Leucine LEU (L)54.39%
Asparagine ASN (N)54.39%
Glutamine GLN (Q)21.75%
Proline PRO (P)54.39%
Serine SER (S)87.02%
Arginine ARG (R)54.39%
Threonine THR (T)97.89%
Tryptophan TRP (W)00%
Valine VAL (V)1513.16%
Tyrosine TYR (Y)32.63%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC499
HydrogenH835
NitrogenN143
OxygenO164
SulphurS16

FormulaC499H835N143O164S16
Total Number of Atoms:1657


Total number of positively charged residues (ARG + LYS):12
Total number of negatively charged residues (ASP + GLU):11
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    5220
Absorption 0.1% (=1 g/l)    0.436,   assuming all pairs of CYS residues form cystines

Ext. coefficient    4470
Absorption 0.1% (=1 g/l)    0.373,   assuming all CYS residues are reduced
Aromaticity:0.026

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 30.94

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[23.68, 21.05, 24.56]

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:80.3509
Grand average of hydropathicity (GRAVY):0.19