Physicochemical Properties of Peptide



PPepDB ID:PPepDB_799
Number of amino acids:255
Molecular Weight:27023.59 Da
Theoretical pI:6.06


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)228.63%
Cysteine CYS (C)166.27%
Glutamic Acid GLU (E)41.57%
Aspartic Acid ASP (D)124.71%
Glycine GLY (G)2710.59%
Phynylalanine PHE (F)135.1%
Isoleucine ILE (I)62.35%
Histidine HIS (H)20.78%
Lysine LYS (K)72.75%
Methionine MET (M)72.75%
Leucine LEU (L)207.84%
Asparagine ASN (N)176.67%
Glutamine GLN (Q)103.92%
Proline PRO (P)187.06%
Serine SER (S)218.24%
Arginine ARG (R)83.14%
Threonine THR (T)207.84%
Tryptophan TRP (W)41.57%
Valine VAL (V)135.1%
Tyrosine TYR (Y)83.14%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1178
HydrogenH1803
NitrogenN321
OxygenO364
SulphurS23

FormulaC1178H1803N321O364S23
Total Number of Atoms:3689


Total number of positively charged residues (ARG + LYS):15
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    34920
Absorption 0.1% (=1 g/l)    1.292,   assuming all pairs of CYS residues form cystines

Ext. coefficient    33920
Absorption 0.1% (=1 g/l)    1.255,   assuming all CYS residues are reduced
Aromaticity:0.098

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 37.83

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[25.10, 32.55, 20.78]

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:63.1765
Grand average of hydropathicity (GRAVY):-0.07