Physicochemical Properties of Peptide



PPepDB ID:PPepDB_6044
Number of amino acids:115
Molecular Weight:11175.17 Da
Theoretical pI:9.32


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)2723.48%
Cysteine CYS (C)86.96%
Glutamic Acid GLU (E)00%
Aspartic Acid ASP (D)32.61%
Glycine GLY (G)108.7%
Phynylalanine PHE (F)00%
Isoleucine ILE (I)76.09%
Histidine HIS (H)00%
Lysine LYS (K)76.09%
Methionine MET (M)43.48%
Leucine LEU (L)65.22%
Asparagine ASN (N)21.74%
Glutamine GLN (Q)43.48%
Proline PRO (P)54.35%
Serine SER (S)1311.3%
Arginine ARG (R)43.48%
Threonine THR (T)32.61%
Tryptophan TRP (W)00%
Valine VAL (V)108.7%
Tyrosine TYR (Y)21.74%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC473
HydrogenH806
NitrogenN140
OxygenO146
SulphurS12

FormulaC473H806N140O146S12
Total Number of Atoms:1577


Total number of positively charged residues (ARG + LYS):11
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)    0.311,   assuming all pairs of CYS residues form cystines

Ext. coefficient    2980
Absorption 0.1% (=1 g/l)    0.267,   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 : 33.70

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[21.74, 26.09, 32.17]

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:92.7826
Grand average of hydropathicity (GRAVY):0.60