Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5457
Number of amino acids:107
Molecular Weight:11908.77 Da
Theoretical pI:7.63


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)65.61%
Cysteine CYS (C)1110.28%
Glutamic Acid GLU (E)65.61%
Aspartic Acid ASP (D)54.67%
Glycine GLY (G)32.8%
Phynylalanine PHE (F)65.61%
Isoleucine ILE (I)32.8%
Histidine HIS (H)21.87%
Lysine LYS (K)54.67%
Methionine MET (M)32.8%
Leucine LEU (L)87.48%
Asparagine ASN (N)54.67%
Glutamine GLN (Q)32.8%
Proline PRO (P)98.41%
Serine SER (S)98.41%
Arginine ARG (R)76.54%
Threonine THR (T)87.48%
Tryptophan TRP (W)00%
Valine VAL (V)76.54%
Tyrosine TYR (Y)10.93%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC509
HydrogenH813
NitrogenN145
OxygenO156
SulphurS14

FormulaC509H813N145O156S14
Total Number of Atoms:1637


Total number of positively charged residues (ARG + LYS):12
Total number of negatively charged residues (ASP + GLU):11
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    2115
Absorption 0.1% (=1 g/l)    0.178,   assuming all pairs of CYS residues form cystines

Ext. coefficient    1490
Absorption 0.1% (=1 g/l)    0.125,   assuming all CYS residues are reduced
Aromaticity:0.065

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 63.76

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[23.36, 24.30, 21.50]

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:64.6729
Grand average of hydropathicity (GRAVY):-0.18