Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5081
Number of amino acids:93
Molecular Weight:10735.71 Da
Theoretical pI:9.18


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)33.23%
Cysteine CYS (C)1010.75%
Glutamic Acid GLU (E)66.45%
Aspartic Acid ASP (D)22.15%
Glycine GLY (G)44.3%
Phynylalanine PHE (F)66.45%
Isoleucine ILE (I)55.38%
Histidine HIS (H)22.15%
Lysine LYS (K)1212.9%
Methionine MET (M)22.15%
Leucine LEU (L)33.23%
Asparagine ASN (N)44.3%
Glutamine GLN (Q)22.15%
Proline PRO (P)44.3%
Serine SER (S)66.45%
Arginine ARG (R)55.38%
Threonine THR (T)44.3%
Tryptophan TRP (W)11.08%
Valine VAL (V)99.68%
Tyrosine TYR (Y)33.23%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC474
HydrogenH753
NitrogenN131
OxygenO129
SulphurS12

FormulaC474H753N131O129S12
Total Number of Atoms:1499


Total number of positively charged residues (ARG + LYS):17
Total number of negatively charged residues (ASP + GLU):8
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)    0.987,   assuming all pairs of CYS residues form cystines

Ext. coefficient    9970
Absorption 0.1% (=1 g/l)    0.929,   assuming all CYS residues are reduced
Aromaticity:0.108

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 47.02

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[29.03, 19.35, 15.05]

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:64.8387
Grand average of hydropathicity (GRAVY):-0.24