Physicochemical Properties of Peptide



PPepDB ID:PPepDB_6107
Number of amino acids:162
Molecular Weight:17777.46 Da
Theoretical pI:5.88


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)106.17%
Cysteine CYS (C)31.85%
Glutamic Acid GLU (E)74.32%
Aspartic Acid ASP (D)116.79%
Glycine GLY (G)127.41%
Phynylalanine PHE (F)74.32%
Isoleucine ILE (I)106.17%
Histidine HIS (H)31.85%
Lysine LYS (K)116.79%
Methionine MET (M)42.47%
Leucine LEU (L)2112.96%
Asparagine ASN (N)95.56%
Glutamine GLN (Q)31.85%
Proline PRO (P)106.17%
Serine SER (S)138.02%
Arginine ARG (R)53.09%
Threonine THR (T)95.56%
Tryptophan TRP (W)10.62%
Valine VAL (V)84.94%
Tyrosine TYR (Y)53.09%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC797
HydrogenH1263
NitrogenN207
OxygenO238
SulphurS7

FormulaC797H1263N207O238S7
Total Number of Atoms:2512


Total number of positively charged residues (ARG + LYS):16
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    13075
Absorption 0.1% (=1 g/l)    0.735,   assuming all pairs of CYS residues form cystines

Ext. coefficient    12950
Absorption 0.1% (=1 g/l)    0.728,   assuming all CYS residues are reduced
Aromaticity:0.080

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 42.92

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[32.10, 27.16, 25.93]

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:95.1236
Grand average of hydropathicity (GRAVY):-0.09