Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5763
Number of amino acids:118
Molecular Weight:11501.19 Da
Theoretical pI:8.94


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)2117.8%
Cysteine CYS (C)86.78%
Glutamic Acid GLU (E)00%
Aspartic Acid ASP (D)21.69%
Glycine GLY (G)108.47%
Phynylalanine PHE (F)00%
Isoleucine ILE (I)65.08%
Histidine HIS (H)10.85%
Lysine LYS (K)21.69%
Methionine MET (M)21.69%
Leucine LEU (L)108.47%
Asparagine ASN (N)75.93%
Glutamine GLN (Q)21.69%
Proline PRO (P)65.08%
Serine SER (S)1916.1%
Arginine ARG (R)54.24%
Threonine THR (T)65.08%
Tryptophan TRP (W)00%
Valine VAL (V)97.63%
Tyrosine TYR (Y)21.69%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC481
HydrogenH808
NitrogenN146
OxygenO159
SulphurS10

FormulaC481H808N146O159S10
Total Number of Atoms:1604


Total number of positively charged residues (ARG + LYS):7
Total number of negatively charged residues (ASP + GLU):2
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)    0.303,   assuming all pairs of CYS residues form cystines

Ext. coefficient    2980
Absorption 0.1% (=1 g/l)    0.259,   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 : 44.20

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[22.88, 35.59, 27.97]

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:92.7966
Grand average of hydropathicity (GRAVY):0.48