Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5814
Number of amino acids:132
Molecular Weight:13404.26 Da
Theoretical pI:7.64


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)1612.12%
Cysteine CYS (C)107.58%
Glutamic Acid GLU (E)75.3%
Aspartic Acid ASP (D)64.55%
Glycine GLY (G)1511.36%
Phynylalanine PHE (F)43.03%
Isoleucine ILE (I)43.03%
Histidine HIS (H)32.27%
Lysine LYS (K)139.85%
Methionine MET (M)21.52%
Leucine LEU (L)32.27%
Asparagine ASN (N)10.76%
Glutamine GLN (Q)10.76%
Proline PRO (P)2115.91%
Serine SER (S)139.85%
Arginine ARG (R)10.76%
Threonine THR (T)43.03%
Tryptophan TRP (W)10.76%
Valine VAL (V)43.03%
Tyrosine TYR (Y)32.27%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC584
HydrogenH903
NitrogenN157
OxygenO181
SulphurS12

FormulaC584H903N157O181S12
Total Number of Atoms:1837


Total number of positively charged residues (ARG + LYS):14
Total number of negatively charged residues (ASP + GLU):13
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    10595
Absorption 0.1% (=1 g/l)    0.790,   assuming all pairs of CYS residues form cystines

Ext. coefficient    9970
Absorption 0.1% (=1 g/l)    0.744,   assuming all CYS residues are reduced
Aromaticity:0.061

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 76.24

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[14.39, 37.88, 21.21]

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:41.5909
Grand average of hydropathicity (GRAVY):-0.45