Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5485
Number of amino acids:262
Molecular Weight:28387.35 Da
Theoretical pI:8.96


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)259.54%
Cysteine CYS (C)93.44%
Glutamic Acid GLU (E)10.38%
Aspartic Acid ASP (D)134.96%
Glycine GLY (G)2810.69%
Phynylalanine PHE (F)145.34%
Isoleucine ILE (I)134.96%
Histidine HIS (H)41.53%
Lysine LYS (K)124.58%
Methionine MET (M)83.05%
Leucine LEU (L)134.96%
Asparagine ASN (N)145.34%
Glutamine GLN (Q)114.2%
Proline PRO (P)166.11%
Serine SER (S)176.49%
Arginine ARG (R)93.44%
Threonine THR (T)228.4%
Tryptophan TRP (W)93.44%
Valine VAL (V)155.73%
Tyrosine TYR (Y)93.44%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1272
HydrogenH1921
NitrogenN343
OxygenO364
SulphurS17

FormulaC1272H1921N343O364S17
Total Number of Atoms:3917


Total number of positively charged residues (ARG + LYS):21
Total number of negatively charged residues (ASP + GLU):14
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    63410
Absorption 0.1% (=1 g/l)    2.234,   assuming all pairs of CYS residues form cystines

Ext. coefficient    62910
Absorption 0.1% (=1 g/l)    2.216,   assuming all CYS residues are reduced
Aromaticity:0.122

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 26.90

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[27.86, 28.63, 17.94]

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:64.8473
Grand average of hydropathicity (GRAVY):-0.11