Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4077
Number of amino acids:116
Molecular Weight:11345.22 Da
Theoretical pI:9.58


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)2622.41%
Cysteine CYS (C)86.9%
Glutamic Acid GLU (E)00%
Aspartic Acid ASP (D)21.72%
Glycine GLY (G)108.62%
Phynylalanine PHE (F)00%
Isoleucine ILE (I)54.31%
Histidine HIS (H)10.86%
Lysine LYS (K)43.45%
Methionine MET (M)10.86%
Leucine LEU (L)108.62%
Asparagine ASN (N)54.31%
Glutamine GLN (Q)21.72%
Proline PRO (P)54.31%
Serine SER (S)1210.34%
Arginine ARG (R)76.03%
Threonine THR (T)65.17%
Tryptophan TRP (W)00%
Valine VAL (V)108.62%
Tyrosine TYR (Y)21.72%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC480
HydrogenH816
NitrogenN150
OxygenO148
SulphurS9

FormulaC480H816N150O148S9
Total Number of Atoms:1603


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

Ext. coefficient    2980
Absorption 0.1% (=1 g/l)    0.263,   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 : 30.78

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[23.28, 27.59, 31.90]

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:97.8448
Grand average of hydropathicity (GRAVY):0.53