Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4075
Number of amino acids:116
Molecular Weight:11783.82 Da
Theoretical pI:8.76


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)1512.93%
Cysteine CYS (C)108.62%
Glutamic Acid GLU (E)00%
Aspartic Acid ASP (D)32.59%
Glycine GLY (G)1210.34%
Phynylalanine PHE (F)21.72%
Isoleucine ILE (I)86.9%
Histidine HIS (H)10.86%
Lysine LYS (K)54.31%
Methionine MET (M)43.45%
Leucine LEU (L)86.9%
Asparagine ASN (N)108.62%
Glutamine GLN (Q)21.72%
Proline PRO (P)76.03%
Serine SER (S)86.9%
Arginine ARG (R)32.59%
Threonine THR (T)65.17%
Tryptophan TRP (W)00%
Valine VAL (V)97.76%
Tyrosine TYR (Y)32.59%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC504
HydrogenH826
NitrogenN144
OxygenO152
SulphurS14

FormulaC504H826N144O152S14
Total Number of Atoms:1640


Total number of positively charged residues (ARG + LYS):8
Total number of negatively charged residues (ASP + GLU):3
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)    0.432,   assuming all pairs of CYS residues form cystines

Ext. coefficient    4470
Absorption 0.1% (=1 g/l)    0.379,   assuming all CYS residues are reduced
Aromaticity:0.043

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 36.80

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[25.86, 31.90, 23.28]

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:89.2241
Grand average of hydropathicity (GRAVY):0.43