Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4832
Number of amino acids:119
Molecular Weight:12962.91 Da
Theoretical pI:5.2


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)108.4%
Cysteine CYS (C)108.4%
Glutamic Acid GLU (E)54.2%
Aspartic Acid ASP (D)86.72%
Glycine GLY (G)86.72%
Phynylalanine PHE (F)86.72%
Isoleucine ILE (I)54.2%
Histidine HIS (H)21.68%
Lysine LYS (K)65.04%
Methionine MET (M)54.2%
Leucine LEU (L)75.88%
Asparagine ASN (N)54.2%
Glutamine GLN (Q)10.84%
Proline PRO (P)97.56%
Serine SER (S)108.4%
Arginine ARG (R)43.36%
Threonine THR (T)65.04%
Tryptophan TRP (W)10.84%
Valine VAL (V)65.04%
Tyrosine TYR (Y)32.52%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC566
HydrogenH868
NitrogenN148
OxygenO171
SulphurS15

FormulaC566H868N148O171S15
Total Number of Atoms:1768


Total number of positively charged residues (ARG + LYS):10
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    10595
Absorption 0.1% (=1 g/l)    0.817,   assuming all pairs of CYS residues form cystines

Ext. coefficient    9970
Absorption 0.1% (=1 g/l)    0.769,   assuming all CYS residues are reduced
Aromaticity:0.101

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 50.14

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[25.21, 26.89, 22.69]

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:62.3529
Grand average of hydropathicity (GRAVY):0.00