Physicochemical Properties of Peptide



PPepDB ID:PPepDB_1081
Number of amino acids:113
Molecular Weight:12146.18 Da
Theoretical pI:5.3


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)108.85%
Cysteine CYS (C)65.31%
Glutamic Acid GLU (E)65.31%
Aspartic Acid ASP (D)54.42%
Glycine GLY (G)54.42%
Phynylalanine PHE (F)43.54%
Isoleucine ILE (I)87.08%
Histidine HIS (H)00%
Lysine LYS (K)76.19%
Methionine MET (M)32.65%
Leucine LEU (L)1412.39%
Asparagine ASN (N)76.19%
Glutamine GLN (Q)10.88%
Proline PRO (P)43.54%
Serine SER (S)119.73%
Arginine ARG (R)32.65%
Threonine THR (T)97.96%
Tryptophan TRP (W)10.88%
Valine VAL (V)87.08%
Tyrosine TYR (Y)10.88%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC533
HydrogenH876
NitrogenN138
OxygenO165
SulphurS9

FormulaC533H876N138O165S9
Total Number of Atoms:1721


Total number of positively charged residues (ARG + LYS):10
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    7365
Absorption 0.1% (=1 g/l)    0.606,   assuming all pairs of CYS residues form cystines

Ext. coefficient    6990
Absorption 0.1% (=1 g/l)    0.575,   assuming all CYS residues are reduced
Aromaticity:0.053

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 37.75

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[31.86, 23.89, 29.20]

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:105.31
Grand average of hydropathicity (GRAVY):0.35