Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5657
Number of amino acids:97
Molecular Weight:10528.17 Da
Theoretical pI:7.68


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)44.12%
Cysteine CYS (C)99.28%
Glutamic Acid GLU (E)22.06%
Aspartic Acid ASP (D)33.09%
Glycine GLY (G)55.15%
Phynylalanine PHE (F)33.09%
Isoleucine ILE (I)44.12%
Histidine HIS (H)11.03%
Lysine LYS (K)33.09%
Methionine MET (M)33.09%
Leucine LEU (L)1111.34%
Asparagine ASN (N)99.28%
Glutamine GLN (Q)66.19%
Proline PRO (P)99.28%
Serine SER (S)1212.37%
Arginine ARG (R)33.09%
Threonine THR (T)33.09%
Tryptophan TRP (W)22.06%
Valine VAL (V)55.15%
Tyrosine TYR (Y)00%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC451
HydrogenH720
NitrogenN128
OxygenO138
SulphurS12

FormulaC451H720N128O138S12
Total Number of Atoms:1449


Total number of positively charged residues (ARG + LYS):6
Total number of negatively charged residues (ASP + GLU):5
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    11500
Absorption 0.1% (=1 g/l)    1.092,   assuming all pairs of CYS residues form cystines

Ext. coefficient    11000
Absorption 0.1% (=1 g/l)    1.045,   assuming all CYS residues are reduced
Aromaticity:0.052

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 76.99

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[25.77, 36.08, 20.62]

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:79.3814
Grand average of hydropathicity (GRAVY):-0.04