Physicochemical Properties of Peptide



PPepDB ID:PPepDB_1392
Number of amino acids:220
Molecular Weight:24033.92 Da
Theoretical pI:6.52


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)125.45%
Cysteine CYS (C)146.36%
Glutamic Acid GLU (E)41.82%
Aspartic Acid ASP (D)125.45%
Glycine GLY (G)2210%
Phynylalanine PHE (F)135.91%
Isoleucine ILE (I)104.55%
Histidine HIS (H)10.45%
Lysine LYS (K)52.27%
Methionine MET (M)41.82%
Leucine LEU (L)125.45%
Asparagine ASN (N)177.73%
Glutamine GLN (Q)94.09%
Proline PRO (P)146.36%
Serine SER (S)209.09%
Arginine ARG (R)115%
Threonine THR (T)188.18%
Tryptophan TRP (W)52.27%
Valine VAL (V)94.09%
Tyrosine TYR (Y)83.64%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1048
HydrogenH1581
NitrogenN291
OxygenO325
SulphurS18

FormulaC1048H1581N291O325S18
Total Number of Atoms:3263


Total number of positively charged residues (ARG + LYS):16
Total number of negatively charged residues (ASP + GLU):16
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    40295
Absorption 0.1% (=1 g/l)    1.677,   assuming all pairs of CYS residues form cystines

Ext. coefficient    39420
Absorption 0.1% (=1 g/l)    1.640,   assuming all CYS residues are reduced
Aromaticity:0.118

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 41.47

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[25.91, 33.18, 14.55]

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:56.3182
Grand average of hydropathicity (GRAVY):-0.29