Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5812
Number of amino acids:117
Molecular Weight:12555.85 Da
Theoretical pI:9.17


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)75.98%
Cysteine CYS (C)10.85%
Glutamic Acid GLU (E)97.69%
Aspartic Acid ASP (D)43.42%
Glycine GLY (G)1210.26%
Phynylalanine PHE (F)21.71%
Isoleucine ILE (I)65.13%
Histidine HIS (H)21.71%
Lysine LYS (K)1613.68%
Methionine MET (M)32.56%
Leucine LEU (L)1411.97%
Asparagine ASN (N)32.56%
Glutamine GLN (Q)10.85%
Proline PRO (P)32.56%
Serine SER (S)108.55%
Arginine ARG (R)10.85%
Threonine THR (T)32.56%
Tryptophan TRP (W)10.85%
Valine VAL (V)1613.68%
Tyrosine TYR (Y)32.56%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC568
HydrogenH943
NitrogenN145
OxygenO164
SulphurS4

FormulaC568H943N145O164S4
Total Number of Atoms:1824


Total number of positively charged residues (ARG + LYS):17
Total number of negatively charged residues (ASP + GLU):13
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    9970
Absorption 0.1% (=1 g/l)    0.794,   assuming all pairs of CYS residues form cystines

Ext. coefficient    9970
Absorption 0.1% (=1 g/l)    0.794,   assuming all CYS residues are reduced
Aromaticity:0.051

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 29.96

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[35.90, 23.93, 28.21]

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:112.308
Grand average of hydropathicity (GRAVY):0.14