Physicochemical Properties of Peptide



PPepDB ID:PPepDB_581
Number of amino acids:106
Molecular Weight:11313.17 Da
Theoretical pI:6.09


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)109.43%
Cysteine CYS (C)65.66%
Glutamic Acid GLU (E)65.66%
Aspartic Acid ASP (D)43.77%
Glycine GLY (G)65.66%
Phynylalanine PHE (F)43.77%
Isoleucine ILE (I)87.55%
Histidine HIS (H)21.89%
Lysine LYS (K)98.49%
Methionine MET (M)21.89%
Leucine LEU (L)1110.38%
Asparagine ASN (N)76.6%
Glutamine GLN (Q)00%
Proline PRO (P)54.72%
Serine SER (S)98.49%
Arginine ARG (R)00%
Threonine THR (T)76.6%
Tryptophan TRP (W)00%
Valine VAL (V)76.6%
Tyrosine TYR (Y)32.83%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC502
HydrogenH808
NitrogenN126
OxygenO153
SulphurS8

FormulaC502H808N126O153S8
Total Number of Atoms:1597


Total number of positively charged residues (ARG + LYS):9
Total number of negatively charged residues (ASP + GLU):10
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    4845
Absorption 0.1% (=1 g/l)    0.428,   assuming all pairs of CYS residues form cystines

Ext. coefficient    4470
Absorption 0.1% (=1 g/l)    0.395,   assuming all CYS residues are reduced
Aromaticity:0.066

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 29.71

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[31.13, 25.47, 27.36]

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:98.4907
Grand average of hydropathicity (GRAVY):0.26