Physicochemical Properties of Peptide



PPepDB ID:PPepDB_1524
Number of amino acids:64
Molecular Weight:6926.12 Da
Theoretical pI:6.69


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)46.25%
Cysteine CYS (C)69.38%
Glutamic Acid GLU (E)23.13%
Aspartic Acid ASP (D)34.69%
Glycine GLY (G)46.25%
Phynylalanine PHE (F)00%
Isoleucine ILE (I)46.25%
Histidine HIS (H)11.56%
Lysine LYS (K)34.69%
Methionine MET (M)23.13%
Leucine LEU (L)69.38%
Asparagine ASN (N)34.69%
Glutamine GLN (Q)23.13%
Proline PRO (P)34.69%
Serine SER (S)69.38%
Arginine ARG (R)23.13%
Threonine THR (T)34.69%
Tryptophan TRP (W)23.13%
Valine VAL (V)710.94%
Tyrosine TYR (Y)11.56%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC299
HydrogenH486
NitrogenN82
OxygenO90
SulphurS8

FormulaC299H486N82O90S8
Total Number of Atoms:965


Total number of positively charged residues (ARG + LYS):5
Total number of negatively charged residues (ASP + GLU):5
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    12865
Absorption 0.1% (=1 g/l)    1.857,   assuming all pairs of CYS residues form cystines

Ext. coefficient    12490
Absorption 0.1% (=1 g/l)    1.803,   assuming all CYS residues are reduced
Aromaticity:0.047

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 32.17

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[31.25, 25.00, 21.88]

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:98.9062
Grand average of hydropathicity (GRAVY):0.33