Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4233
Number of amino acids:147
Molecular Weight:16089.73 Da
Theoretical pI:10.08


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)96.12%
Cysteine CYS (C)10.68%
Glutamic Acid GLU (E)42.72%
Aspartic Acid ASP (D)21.36%
Glycine GLY (G)106.8%
Phynylalanine PHE (F)64.08%
Isoleucine ILE (I)85.44%
Histidine HIS (H)10.68%
Lysine LYS (K)74.76%
Methionine MET (M)32.04%
Leucine LEU (L)149.52%
Asparagine ASN (N)85.44%
Glutamine GLN (Q)138.84%
Proline PRO (P)85.44%
Serine SER (S)138.84%
Arginine ARG (R)74.76%
Threonine THR (T)85.44%
Tryptophan TRP (W)10.68%
Valine VAL (V)2013.61%
Tyrosine TYR (Y)42.72%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC724
HydrogenH1173
NitrogenN199
OxygenO206
SulphurS4

FormulaC724H1173N199O206S4
Total Number of Atoms:2306


Total number of positively charged residues (ARG + LYS):14
Total number of negatively charged residues (ASP + GLU):6
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    11460
Absorption 0.1% (=1 g/l)    0.712,   assuming all pairs of CYS residues form cystines

Ext. coefficient    11460
Absorption 0.1% (=1 g/l)    0.712,   assuming all CYS residues are reduced
Aromaticity:0.075

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 38.06

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[36.05, 26.53, 20.41]

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:103.945
Grand average of hydropathicity (GRAVY):0.13