Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5723
Number of amino acids:63
Molecular Weight:7314.79 Da
Theoretical pI:9.5


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)23.17%
Cysteine CYS (C)69.52%
Glutamic Acid GLU (E)34.76%
Aspartic Acid ASP (D)11.59%
Glycine GLY (G)34.76%
Phynylalanine PHE (F)46.35%
Isoleucine ILE (I)34.76%
Histidine HIS (H)00%
Lysine LYS (K)69.52%
Methionine MET (M)57.94%
Leucine LEU (L)46.35%
Asparagine ASN (N)914.29%
Glutamine GLN (Q)00%
Proline PRO (P)34.76%
Serine SER (S)23.17%
Arginine ARG (R)57.94%
Threonine THR (T)11.59%
Tryptophan TRP (W)11.59%
Valine VAL (V)57.94%
Tyrosine TYR (Y)00%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC315
HydrogenH514
NitrogenN94
OxygenO84
SulphurS11

FormulaC315H514N94O84S11
Total Number of Atoms:1018


Total number of positively charged residues (ARG + LYS):11
Total number of negatively charged residues (ASP + GLU):4
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    5875
Absorption 0.1% (=1 g/l)    0.803,   assuming all pairs of CYS residues form cystines

Ext. coefficient    5500
Absorption 0.1% (=1 g/l)    0.752,   assuming all CYS residues are reduced
Aromaticity:0.079

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 62.91

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[26.98, 26.98, 22.22]

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:69.5238
Grand average of hydropathicity (GRAVY):-0.18