Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5594
Number of amino acids:117
Molecular Weight:12301.24 Da
Theoretical pI:8.71


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)1411.97%
Cysteine CYS (C)86.84%
Glutamic Acid GLU (E)10.85%
Aspartic Acid ASP (D)54.27%
Glycine GLY (G)97.69%
Phynylalanine PHE (F)00%
Isoleucine ILE (I)65.13%
Histidine HIS (H)21.71%
Lysine LYS (K)43.42%
Methionine MET (M)43.42%
Leucine LEU (L)119.4%
Asparagine ASN (N)108.55%
Glutamine GLN (Q)65.13%
Proline PRO (P)75.98%
Serine SER (S)86.84%
Arginine ARG (R)65.13%
Threonine THR (T)43.42%
Tryptophan TRP (W)00%
Valine VAL (V)97.69%
Tyrosine TYR (Y)32.56%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC520
HydrogenH861
NitrogenN159
OxygenO161
SulphurS12

FormulaC520H861N159O161S12
Total Number of Atoms:1713


Total number of positively charged residues (ARG + LYS):10
Total number of negatively charged residues (ASP + GLU):6
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    4970
Absorption 0.1% (=1 g/l)    0.404,   assuming all pairs of CYS residues form cystines

Ext. coefficient    4470
Absorption 0.1% (=1 g/l)    0.363,   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 : 35.23

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[24.79, 29.06, 25.64]

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:90.9402
Grand average of hydropathicity (GRAVY):0.05