Physicochemical Properties of Peptide



PPepDB ID:PPepDB_594
Number of amino acids:105
Molecular Weight:11211.1 Da
Theoretical pI:6.09


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)98.57%
Cysteine CYS (C)65.71%
Glutamic Acid GLU (E)54.76%
Aspartic Acid ASP (D)54.76%
Glycine GLY (G)54.76%
Phynylalanine PHE (F)32.86%
Isoleucine ILE (I)76.67%
Histidine HIS (H)21.9%
Lysine LYS (K)98.57%
Methionine MET (M)10.95%
Leucine LEU (L)1312.38%
Asparagine ASN (N)76.67%
Glutamine GLN (Q)10.95%
Proline PRO (P)54.76%
Serine SER (S)65.71%
Arginine ARG (R)00%
Threonine THR (T)109.52%
Tryptophan TRP (W)00%
Valine VAL (V)98.57%
Tyrosine TYR (Y)21.9%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC497
HydrogenH814
NitrogenN126
OxygenO152
SulphurS7

FormulaC497H814N126O152S7
Total Number of Atoms:1596


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)    0.299,   assuming all pairs of CYS residues form cystines

Ext. coefficient    2980
Absorption 0.1% (=1 g/l)    0.266,   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 : 28.01

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[32.38, 21.90, 26.67]

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:107.714
Grand average of hydropathicity (GRAVY):0.30