Physicochemical Properties of Peptide



PPepDB ID:PPepDB_826
Number of amino acids:255
Molecular Weight:27113.25 Da
Theoretical pI:6.83


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)176.67%
Cysteine CYS (C)176.67%
Glutamic Acid GLU (E)31.18%
Aspartic Acid ASP (D)166.27%
Glycine GLY (G)249.41%
Phynylalanine PHE (F)103.92%
Isoleucine ILE (I)155.88%
Histidine HIS (H)41.57%
Lysine LYS (K)124.71%
Methionine MET (M)20.78%
Leucine LEU (L)135.1%
Asparagine ASN (N)207.84%
Glutamine GLN (Q)62.35%
Proline PRO (P)114.31%
Serine SER (S)3312.94%
Arginine ARG (R)72.75%
Threonine THR (T)176.67%
Tryptophan TRP (W)31.18%
Valine VAL (V)145.49%
Tyrosine TYR (Y)114.31%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1169
HydrogenH1801
NitrogenN325
OxygenO381
SulphurS19

FormulaC1169H1801N325O381S19
Total Number of Atoms:3695


Total number of positively charged residues (ARG + LYS):19
Total number of negatively charged residues (ASP + GLU):19
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    33890
Absorption 0.1% (=1 g/l)    1.250,   assuming all pairs of CYS residues form cystines

Ext. coefficient    32890
Absorption 0.1% (=1 g/l)    1.213,   assuming all CYS residues are reduced
Aromaticity:0.094

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 41.06

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[25.88, 34.51, 13.73]

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:65.4118
Grand average of hydropathicity (GRAVY):-0.20