Physicochemical Properties of Peptide



PPepDB ID:PPepDB_6033
Number of amino acids:64
Molecular Weight:7005.41 Da
Theoretical pI:9.59


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)57.81%
Cysteine CYS (C)69.38%
Glutamic Acid GLU (E)11.56%
Aspartic Acid ASP (D)11.56%
Glycine GLY (G)69.38%
Phynylalanine PHE (F)34.69%
Isoleucine ILE (I)57.81%
Histidine HIS (H)00%
Lysine LYS (K)69.38%
Methionine MET (M)23.13%
Leucine LEU (L)57.81%
Asparagine ASN (N)23.13%
Glutamine GLN (Q)23.13%
Proline PRO (P)23.13%
Serine SER (S)710.94%
Arginine ARG (R)46.25%
Threonine THR (T)00%
Tryptophan TRP (W)11.56%
Valine VAL (V)46.25%
Tyrosine TYR (Y)23.13%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC309
HydrogenH503
NitrogenN87
OxygenO82
SulphurS8

FormulaC309H503N87O82S8
Total Number of Atoms:989


Total number of positively charged residues (ARG + LYS):10
Total number of negatively charged residues (ASP + GLU):2
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    8855
Absorption 0.1% (=1 g/l)    1.264,   assuming all pairs of CYS residues form cystines

Ext. coefficient    8480
Absorption 0.1% (=1 g/l)    1.210,   assuming all CYS residues are reduced
Aromaticity:0.094

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 21.18

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[31.25, 26.56, 20.31]

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:86.875
Grand average of hydropathicity (GRAVY):0.27