Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5488
Number of amino acids:251
Molecular Weight:26673.71 Da
Theoretical pI:6.95


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)239.16%
Cysteine CYS (C)93.59%
Glutamic Acid GLU (E)31.2%
Aspartic Acid ASP (D)114.38%
Glycine GLY (G)3313.15%
Phynylalanine PHE (F)135.18%
Isoleucine ILE (I)51.99%
Histidine HIS (H)31.2%
Lysine LYS (K)31.2%
Methionine MET (M)41.59%
Leucine LEU (L)176.77%
Asparagine ASN (N)166.37%
Glutamine GLN (Q)124.78%
Proline PRO (P)135.18%
Serine SER (S)249.56%
Arginine ARG (R)114.38%
Threonine THR (T)155.98%
Tryptophan TRP (W)72.79%
Valine VAL (V)187.17%
Tyrosine TYR (Y)114.38%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1179
HydrogenH1760
NitrogenN328
OxygenO358
SulphurS13

FormulaC1179H1760N328O358S13
Total Number of Atoms:3638


Total number of positively charged residues (ARG + LYS):14
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    55390
Absorption 0.1% (=1 g/l)    2.077,   assuming all pairs of CYS residues form cystines

Ext. coefficient    54890
Absorption 0.1% (=1 g/l)    2.058,   assuming all CYS residues are reduced
Aromaticity:0.124

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 37.32

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[28.29, 34.26, 18.73]

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:64.1434
Grand average of hydropathicity (GRAVY):-0.12