Physicochemical Properties of Peptide



PPepDB ID:PPepDB_850
Number of amino acids:107
Molecular Weight:11602.82 Da
Theoretical pI:6.22


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)98.41%
Cysteine CYS (C)87.48%
Glutamic Acid GLU (E)87.48%
Aspartic Acid ASP (D)32.8%
Glycine GLY (G)87.48%
Phynylalanine PHE (F)43.74%
Isoleucine ILE (I)21.87%
Histidine HIS (H)00%
Lysine LYS (K)98.41%
Methionine MET (M)65.61%
Leucine LEU (L)1614.95%
Asparagine ASN (N)32.8%
Glutamine GLN (Q)32.8%
Proline PRO (P)32.8%
Serine SER (S)54.67%
Arginine ARG (R)21.87%
Threonine THR (T)98.41%
Tryptophan TRP (W)10.93%
Valine VAL (V)76.54%
Tyrosine TYR (Y)10.93%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC507
HydrogenH835
NitrogenN129
OxygenO151
SulphurS14

FormulaC507H835N129O151S14
Total Number of Atoms:1636


Total number of positively charged residues (ARG + LYS):11
Total number of negatively charged residues (ASP + GLU):11
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    7490
Absorption 0.1% (=1 g/l)    0.646,   assuming all pairs of CYS residues form cystines

Ext. coefficient    6990
Absorption 0.1% (=1 g/l)    0.602,   assuming all CYS residues are reduced
Aromaticity:0.056

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 36.12

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[28.97, 17.76, 36.45]

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:92.9908
Grand average of hydropathicity (GRAVY):0.32