Physicochemical Properties of Peptide



PPepDB ID:PPepDB_6010
Number of amino acids:117
Molecular Weight:11966.09 Da
Theoretical pI:9.32


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)1613.68%
Cysteine CYS (C)108.55%
Glutamic Acid GLU (E)00%
Aspartic Acid ASP (D)10.85%
Glycine GLY (G)119.4%
Phynylalanine PHE (F)10.85%
Isoleucine ILE (I)54.27%
Histidine HIS (H)00%
Lysine LYS (K)43.42%
Methionine MET (M)43.42%
Leucine LEU (L)119.4%
Asparagine ASN (N)108.55%
Glutamine GLN (Q)32.56%
Proline PRO (P)86.84%
Serine SER (S)75.98%
Arginine ARG (R)65.13%
Threonine THR (T)97.69%
Tryptophan TRP (W)00%
Valine VAL (V)86.84%
Tyrosine TYR (Y)32.56%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC508
HydrogenH848
NitrogenN152
OxygenO152
SulphurS14

FormulaC508H848N152O152S14
Total Number of Atoms:1674


Total number of positively charged residues (ARG + LYS):10
Total number of negatively charged residues (ASP + GLU):1
Extinction Coefficient:This protein does not contain any Tryptophan residues. Experience shows that this could result in more than 10% error in the computed extinction coefficient.

Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    5095
Absorption 0.1% (=1 g/l)    0.426,   assuming all pairs of CYS residues form cystines

Ext. coefficient    4470
Absorption 0.1% (=1 g/l)    0.374,   assuming all CYS residues are reduced
Aromaticity:0.034

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 36.78

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[23.93, 30.77, 26.50]

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:86.8376
Grand average of hydropathicity (GRAVY):0.32