Physicochemical Properties of Peptide



PPepDB ID:PPepDB_580
Number of amino acids:105
Molecular Weight:11294.25 Da
Theoretical pI:6.31


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)98.57%
Cysteine CYS (C)65.71%
Glutamic Acid GLU (E)65.71%
Aspartic Acid ASP (D)43.81%
Glycine GLY (G)54.76%
Phynylalanine PHE (F)32.86%
Isoleucine ILE (I)76.67%
Histidine HIS (H)32.86%
Lysine LYS (K)98.57%
Methionine MET (M)21.9%
Leucine LEU (L)1514.29%
Asparagine ASN (N)65.71%
Glutamine GLN (Q)10.95%
Proline PRO (P)54.76%
Serine SER (S)76.67%
Arginine ARG (R)00%
Threonine THR (T)98.57%
Tryptophan TRP (W)00%
Valine VAL (V)65.71%
Tyrosine TYR (Y)21.9%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC501
HydrogenH819
NitrogenN127
OxygenO151
SulphurS8

FormulaC501H819N127O151S8
Total Number of Atoms:1606


Total number of positively charged residues (ARG + LYS):9
Total number of negatively charged residues (ASP + GLU):10
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    3355
Absorption 0.1% (=1 g/l)    0.297,   assuming all pairs of CYS residues form cystines

Ext. coefficient    2980
Absorption 0.1% (=1 g/l)    0.264,   assuming all CYS residues are reduced
Aromaticity:0.048

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 37.67

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[31.43, 21.90, 30.48]

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:106.857
Grand average of hydropathicity (GRAVY):0.27