Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4863
Number of amino acids:305
Molecular Weight:34736.94 Da
Theoretical pI:8.36


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)92.95%
Cysteine CYS (C)103.28%
Glutamic Acid GLU (E)61.97%
Aspartic Acid ASP (D)20.66%
Glycine GLY (G)92.95%
Phynylalanine PHE (F)175.57%
Isoleucine ILE (I)154.92%
Histidine HIS (H)41.31%
Lysine LYS (K)61.97%
Methionine MET (M)72.3%
Leucine LEU (L)237.54%
Asparagine ASN (N)51.64%
Glutamine GLN (Q)8026.23%
Proline PRO (P)4815.74%
Serine SER (S)175.57%
Arginine ARG (R)51.64%
Threonine THR (T)134.26%
Tryptophan TRP (W)20.66%
Valine VAL (V)216.89%
Tyrosine TYR (Y)61.97%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1563
HydrogenH2415
NitrogenN421
OxygenO443
SulphurS17

FormulaC1563H2415N421O443S17
Total Number of Atoms:4859


Total number of positively charged residues (ARG + LYS):11
Total number of negatively charged residues (ASP + GLU):8
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    20565
Absorption 0.1% (=1 g/l)    0.592,   assuming all pairs of CYS residues form cystines

Ext. coefficient    19940
Absorption 0.1% (=1 g/l)    0.574,   assuming all CYS residues are reduced
Aromaticity:0.082

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 93.30

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[27.54, 25.90, 14.75]

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:71.5082
Grand average of hydropathicity (GRAVY):-0.50