Physicochemical Properties of Peptide



PPepDB ID:PPepDB_6137
Number of amino acids:69
Molecular Weight:7051.39 Da
Theoretical pI:7.01


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)1318.84%
Cysteine CYS (C)11.45%
Glutamic Acid GLU (E)11.45%
Aspartic Acid ASP (D)00%
Glycine GLY (G)34.35%
Phynylalanine PHE (F)22.9%
Isoleucine ILE (I)22.9%
Histidine HIS (H)68.7%
Lysine LYS (K)11.45%
Methionine MET (M)710.14%
Leucine LEU (L)45.8%
Asparagine ASN (N)22.9%
Glutamine GLN (Q)11.45%
Proline PRO (P)45.8%
Serine SER (S)68.7%
Arginine ARG (R)00%
Threonine THR (T)57.25%
Tryptophan TRP (W)00%
Valine VAL (V)1115.94%
Tyrosine TYR (Y)00%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC310
HydrogenH501
NitrogenN85
OxygenO86
SulphurS8

FormulaC310H501N85O86S8
Total Number of Atoms:990


Total number of positively charged residues (ARG + LYS):1
Total number of negatively charged residues (ASP + GLU):1
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    0
Absorption 0.1% (=1 g/l)    0.000,   assuming all pairs of CYS residues form cystines

Ext. coefficient    0
Absorption 0.1% (=1 g/l)    0.000,   assuming all CYS residues are reduced
Aromaticity:0.029

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 35.18

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[27.54, 21.74, 36.23]

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:98.9854
Grand average of hydropathicity (GRAVY):0.90