Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4806
Number of amino acids:501
Molecular Weight:56553.39 Da
Theoretical pI:6.13


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)265.19%
Cysteine CYS (C)91.8%
Glutamic Acid GLU (E)265.19%
Aspartic Acid ASP (D)214.19%
Glycine GLY (G)336.59%
Phynylalanine PHE (F)193.79%
Isoleucine ILE (I)224.39%
Histidine HIS (H)132.59%
Lysine LYS (K)254.99%
Methionine MET (M)132.59%
Leucine LEU (L)5811.58%
Asparagine ASN (N)326.39%
Glutamine GLN (Q)224.39%
Proline PRO (P)254.99%
Serine SER (S)346.79%
Arginine ARG (R)163.19%
Threonine THR (T)428.38%
Tryptophan TRP (W)91.8%
Valine VAL (V)295.79%
Tyrosine TYR (Y)275.39%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2545
HydrogenH3915
NitrogenN663
OxygenO753
SulphurS22

FormulaC2545H3915N663O753S22
Total Number of Atoms:7898


Total number of positively charged residues (ARG + LYS):41
Total number of negatively charged residues (ASP + GLU):47
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    90230
Absorption 0.1% (=1 g/l)    1.595,   assuming all pairs of CYS residues form cystines

Ext. coefficient    89730
Absorption 0.1% (=1 g/l)    1.587,   assuming all CYS residues are reduced
Aromaticity:0.110

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 39.82

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[32.73, 24.75, 24.55]

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:84.2513
Grand average of hydropathicity (GRAVY):-0.26