Physicochemical Properties of Peptide



PPepDB ID:PPepDB_1461
Number of amino acids:99
Molecular Weight:12268.23 Da
Theoretical pI:8.67


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)33.03%
Cysteine CYS (C)99.09%
Glutamic Acid GLU (E)1111.11%
Aspartic Acid ASP (D)22.02%
Glycine GLY (G)55.05%
Phynylalanine PHE (F)33.03%
Isoleucine ILE (I)00%
Histidine HIS (H)33.03%
Lysine LYS (K)11.01%
Methionine MET (M)77.07%
Leucine LEU (L)77.07%
Asparagine ASN (N)22.02%
Glutamine GLN (Q)77.07%
Proline PRO (P)77.07%
Serine SER (S)33.03%
Arginine ARG (R)1616.16%
Threonine THR (T)00%
Tryptophan TRP (W)55.05%
Valine VAL (V)55.05%
Tyrosine TYR (Y)33.03%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC527
HydrogenH810
NitrogenN168
OxygenO141
SulphurS16

FormulaC527H810N168O141S16
Total Number of Atoms:1662


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    32470
Absorption 0.1% (=1 g/l)    2.647,   assuming all pairs of CYS residues form cystines

Ext. coefficient    31970
Absorption 0.1% (=1 g/l)    2.606,   assuming all CYS residues are reduced
Aromaticity:0.111

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 55.94

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[23.23, 17.17, 28.28]

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:45.2525
Grand average of hydropathicity (GRAVY):-0.90