Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4486
Number of amino acids:444
Molecular Weight:50358.04 Da
Theoretical pI:6.68


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)163.6%
Cysteine CYS (C)122.7%
Glutamic Acid GLU (E)194.28%
Aspartic Acid ASP (D)265.86%
Glycine GLY (G)337.43%
Phynylalanine PHE (F)255.63%
Isoleucine ILE (I)163.6%
Histidine HIS (H)122.7%
Lysine LYS (K)224.95%
Methionine MET (M)153.38%
Leucine LEU (L)378.33%
Asparagine ASN (N)337.43%
Glutamine GLN (Q)71.58%
Proline PRO (P)204.5%
Serine SER (S)378.33%
Arginine ARG (R)214.73%
Threonine THR (T)347.66%
Tryptophan TRP (W)122.7%
Valine VAL (V)306.76%
Tyrosine TYR (Y)173.83%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2246
HydrogenH3407
NitrogenN605
OxygenO663
SulphurS27

FormulaC2246H3407N605O663S27
Total Number of Atoms:6948


Total number of positively charged residues (ARG + LYS):43
Total number of negatively charged residues (ASP + GLU):45
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    92080
Absorption 0.1% (=1 g/l)    1.829,   assuming all pairs of CYS residues form cystines

Ext. coefficient    91330
Absorption 0.1% (=1 g/l)    1.814,   assuming all CYS residues are reduced
Aromaticity:0.122

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 35.36

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[30.86, 27.70, 19.59]

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:69.7522
Grand average of hydropathicity (GRAVY):-0.34