Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5563
Number of amino acids:221
Molecular Weight:25749.75 Da
Theoretical pI:9.26


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)114.98%
Cysteine CYS (C)83.62%
Glutamic Acid GLU (E)104.52%
Aspartic Acid ASP (D)83.62%
Glycine GLY (G)73.17%
Phynylalanine PHE (F)114.98%
Isoleucine ILE (I)156.79%
Histidine HIS (H)41.81%
Lysine LYS (K)156.79%
Methionine MET (M)62.71%
Leucine LEU (L)177.69%
Asparagine ASN (N)146.33%
Glutamine GLN (Q)156.79%
Proline PRO (P)177.69%
Serine SER (S)135.88%
Arginine ARG (R)135.88%
Threonine THR (T)135.88%
Tryptophan TRP (W)41.81%
Valine VAL (V)104.52%
Tyrosine TYR (Y)104.52%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1157
HydrogenH1796
NitrogenN316
OxygenO323
SulphurS14

FormulaC1157H1796N316O323S14
Total Number of Atoms:3606


Total number of positively charged residues (ARG + LYS):28
Total number of negatively charged residues (ASP + GLU):18
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    37400
Absorption 0.1% (=1 g/l)    1.452,   assuming all pairs of CYS residues form cystines

Ext. coefficient    36900
Absorption 0.1% (=1 g/l)    1.433,   assuming all CYS residues are reduced
Aromaticity:0.113

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 37.08

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[30.32, 23.08, 19.91]

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:74.5702
Grand average of hydropathicity (GRAVY):-0.47