Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4960
Number of amino acids:95
Molecular Weight:10864.62 Da
Theoretical pI:7.64


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)22.11%
Cysteine CYS (C)1010.53%
Glutamic Acid GLU (E)1111.58%
Aspartic Acid ASP (D)33.16%
Glycine GLY (G)55.26%
Phynylalanine PHE (F)33.16%
Isoleucine ILE (I)22.11%
Histidine HIS (H)22.11%
Lysine LYS (K)1111.58%
Methionine MET (M)33.16%
Leucine LEU (L)88.42%
Asparagine ASN (N)33.16%
Glutamine GLN (Q)22.11%
Proline PRO (P)33.16%
Serine SER (S)99.47%
Arginine ARG (R)44.21%
Threonine THR (T)33.16%
Tryptophan TRP (W)11.05%
Valine VAL (V)77.37%
Tyrosine TYR (Y)33.16%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC466
HydrogenH748
NitrogenN128
OxygenO144
SulphurS13

FormulaC466H748N128O144S13
Total Number of Atoms:1499


Total number of positively charged residues (ARG + LYS):15
Total number of negatively charged residues (ASP + GLU):14
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)    0.975,   assuming all pairs of CYS residues form cystines

Ext. coefficient    9970
Absorption 0.1% (=1 g/l)    0.918,   assuming all CYS residues are reduced
Aromaticity:0.074

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 52.25

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[25.26, 21.05, 25.26]

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:64.5263
Grand average of hydropathicity (GRAVY):-0.46