Physicochemical Properties of Peptide



PPepDB ID:PPepDB_6053
Number of amino acids:115
Molecular Weight:11221.08 Da
Theoretical pI:9.46


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)2622.61%
Cysteine CYS (C)86.96%
Glutamic Acid GLU (E)00%
Aspartic Acid ASP (D)32.61%
Glycine GLY (G)119.57%
Phynylalanine PHE (F)00%
Isoleucine ILE (I)43.48%
Histidine HIS (H)10.87%
Lysine LYS (K)65.22%
Methionine MET (M)21.74%
Leucine LEU (L)97.83%
Asparagine ASN (N)10.87%
Glutamine GLN (Q)21.74%
Proline PRO (P)43.48%
Serine SER (S)1311.3%
Arginine ARG (R)65.22%
Threonine THR (T)76.09%
Tryptophan TRP (W)00%
Valine VAL (V)97.83%
Tyrosine TYR (Y)32.61%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC475
HydrogenH804
NitrogenN144
OxygenO148
SulphurS10

FormulaC475H804N144O148S10
Total Number of Atoms:1581


Total number of positively charged residues (ARG + LYS):12
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    4970
Absorption 0.1% (=1 g/l)    0.443,   assuming all pairs of CYS residues form cystines

Ext. coefficient    4470
Absorption 0.1% (=1 g/l)    0.398,   assuming all CYS residues are reduced
Aromaticity:0.026

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 25.46

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[21.74, 25.22, 32.17]

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:89.3913
Grand average of hydropathicity (GRAVY):0.49