Physicochemical Properties of Peptide



PPepDB ID:PPepDB_6132
Number of amino acids:90
Molecular Weight:10272.79 Da
Theoretical pI:6.02


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)66.67%
Cysteine CYS (C)910%
Glutamic Acid GLU (E)66.67%
Aspartic Acid ASP (D)44.44%
Glycine GLY (G)33.33%
Phynylalanine PHE (F)77.78%
Isoleucine ILE (I)22.22%
Histidine HIS (H)44.44%
Lysine LYS (K)44.44%
Methionine MET (M)44.44%
Leucine LEU (L)66.67%
Asparagine ASN (N)77.78%
Glutamine GLN (Q)11.11%
Proline PRO (P)55.56%
Serine SER (S)66.67%
Arginine ARG (R)44.44%
Threonine THR (T)44.44%
Tryptophan TRP (W)11.11%
Valine VAL (V)55.56%
Tyrosine TYR (Y)22.22%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC446
HydrogenH675
NitrogenN123
OxygenO131
SulphurS13

FormulaC446H675N123O131S13
Total Number of Atoms:1388


Total number of positively charged residues (ARG + LYS):8
Total number of negatively charged residues (ASP + GLU):10
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    8980
Absorption 0.1% (=1 g/l)    0.874,   assuming all pairs of CYS residues form cystines

Ext. coefficient    8480
Absorption 0.1% (=1 g/l)    0.825,   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 : 40.35

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[25.56, 23.33, 24.44]

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:57.4445
Grand average of hydropathicity (GRAVY):-0.18