Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4640
Number of amino acids:102
Molecular Weight:10985.47 Da
Theoretical pI:4.94


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)1716.67%
Cysteine CYS (C)32.94%
Glutamic Acid GLU (E)1110.78%
Aspartic Acid ASP (D)43.92%
Glycine GLY (G)76.86%
Phynylalanine PHE (F)32.94%
Isoleucine ILE (I)10.98%
Histidine HIS (H)21.96%
Lysine LYS (K)10.98%
Methionine MET (M)32.94%
Leucine LEU (L)1413.73%
Asparagine ASN (N)32.94%
Glutamine GLN (Q)21.96%
Proline PRO (P)65.88%
Serine SER (S)65.88%
Arginine ARG (R)98.82%
Threonine THR (T)32.94%
Tryptophan TRP (W)00%
Valine VAL (V)54.9%
Tyrosine TYR (Y)21.96%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC474
HydrogenH763
NitrogenN139
OxygenO149
SulphurS6

FormulaC474H763N139O149S6
Total Number of Atoms:1531


Total number of positively charged residues (ARG + LYS):10
Total number of negatively charged residues (ASP + GLU):15
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    3105
Absorption 0.1% (=1 g/l)    0.283,   assuming all pairs of CYS residues form cystines

Ext. coefficient    2980
Absorption 0.1% (=1 g/l)    0.271,   assuming all CYS residues are reduced
Aromaticity:0.049

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 65.70

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[24.51, 21.57, 44.12]

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:88.2354
Grand average of hydropathicity (GRAVY):-0.12