Physicochemical Properties of Peptide



PPepDB ID:PPepDB_1611
Number of amino acids:23
Molecular Weight:2466.75 Da
Theoretical pI:8.68


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)14.35%
Cysteine CYS (C)313.04%
Glutamic Acid GLU (E)14.35%
Aspartic Acid ASP (D)00%
Glycine GLY (G)313.04%
Phynylalanine PHE (F)00%
Isoleucine ILE (I)00%
Histidine HIS (H)00%
Lysine LYS (K)28.7%
Methionine MET (M)00%
Leucine LEU (L)14.35%
Asparagine ASN (N)417.39%
Glutamine GLN (Q)14.35%
Proline PRO (P)14.35%
Serine SER (S)28.7%
Arginine ARG (R)14.35%
Threonine THR (T)14.35%
Tryptophan TRP (W)14.35%
Valine VAL (V)14.35%
Tyrosine TYR (Y)00%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC99
HydrogenH160
NitrogenN34
OxygenO34
SulphurS3

FormulaC99H160N34O34S3
Total Number of Atoms:330


Total number of positively charged residues (ARG + LYS):3
Total number of negatively charged residues (ASP + GLU):1
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    5625
Absorption 0.1% (=1 g/l)    2.280,   assuming all pairs of CYS residues form cystines

Ext. coefficient    5500
Absorption 0.1% (=1 g/l)    2.230,   assuming all CYS residues are reduced
Aromaticity:0.043

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 27.81

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[13.04, 43.48, 13.04]

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:33.9131
Grand average of hydropathicity (GRAVY):-0.96