Physicochemical Properties of Peptide



PPepDB ID:PPepDB_6073
Number of amino acids:130
Molecular Weight:13916.02 Da
Theoretical pI:6.68


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)118.46%
Cysteine CYS (C)107.69%
Glutamic Acid GLU (E)64.62%
Aspartic Acid ASP (D)64.62%
Glycine GLY (G)118.46%
Phynylalanine PHE (F)96.92%
Isoleucine ILE (I)53.85%
Histidine HIS (H)21.54%
Lysine LYS (K)96.92%
Methionine MET (M)32.31%
Leucine LEU (L)107.69%
Asparagine ASN (N)75.38%
Glutamine GLN (Q)00%
Proline PRO (P)96.92%
Serine SER (S)1310%
Arginine ARG (R)32.31%
Threonine THR (T)53.85%
Tryptophan TRP (W)10.77%
Valine VAL (V)75.38%
Tyrosine TYR (Y)32.31%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC614
HydrogenH948
NitrogenN160
OxygenO183
SulphurS13

FormulaC614H948N160O183S13
Total Number of Atoms:1918


Total number of positively charged residues (ARG + LYS):12
Total number of negatively charged residues (ASP + GLU):12
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)    0.761,   assuming all pairs of CYS residues form cystines

Ext. coefficient    9970
Absorption 0.1% (=1 g/l)    0.716,   assuming all CYS residues are reduced
Aromaticity:0.100

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 28.61

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[26.92, 30.77, 23.08]

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:69.0769
Grand average of hydropathicity (GRAVY):0.05